Showing posts with label meaning of life. Show all posts
Showing posts with label meaning of life. Show all posts

Monday, June 1, 2026

Matthew Shea: God and Happiness (Cambridge Elements, 2024) – Sections 2, 3, and 4 (Post 4/4)

Part 1: Hedonism wins


The dreaded terms ‘objective’ and ‘subjective’ enter into the discussion in Section 2, The Nature of Happiness. Shea says on page 11 that the subjective/objective distinction appears for two separate questions: the metaethical question and the normative question. For the metaethical question Shea asks: “Are there objective truths about happiness that are universally true for all human beings independently of what anyone believes or practices? Or do happiness claims have a subjective truth-value that is determined by individuals or groups in some way?” And for the normative question: “What are the good-making features of a life that explain why someone is happy? Are they subjective sorts of things – mental states or experiences – or are they objective in nature – things other than mental states or experiences?”


So:


Objective truth = truth not depending on mental states or experiences.


Subjective truth = truth depending on mental states or experiences.


Objective good-maker = a good-maker that does not depend on mental states or experiences.


Subjective good-maker = a good-maker that does depend on mental states or experiences.


This confuses me. First, it appears as though the author is using the same sense of ‘objective’ and ‘subjective’ for both of these questions: independence of experience versus dependence. So these terms are not ambiguous, but there’s a need to separate the questions of truth and good-making. 


Second, all good-makers are going to depend on mental states eventually. Separating out good-making from experience will always lead to the absurd conclusion that a person could be happy and yet feel miserable. I don’t believe there can be any miserable happy people. That is a contradiction. It would be equally strange to have someone who feels happy and yet is not happy.


I’m aware that ‘happy’ has at least 4 meanings:


happy(1) = a specific emotion like elation or excitement;


happy(2) = intrinsic goodness, which can be found in any positive emotion, like relief or gratitude, or any positive feeling of any kind, like the soothing warmth of a hot tub;


happy(3) = contentment, a lack of negative emotions, and perhaps a disposition to agree that one has no serious problems with whatever it is they are happy with (their life, their job, their marriage);


happy(4) = eudaimonia or flourishing. If someone is happy they are flourishing, whatever that means.


So ‘happy’ is ambiguous and worth specifying. When I use ‘happy’ I mean intrinsic goodness, happy(2). ‘Flourishing’, to me, means living in a condition of optimized happiness: you have access to all major forms of happiness that a rational person needs for life to be highly worth living, and you are free from all major pains that would make life not worth living for a rational person. The happiness and pain you experience are virtuous and extrinsically good; there is no evil happiness (e.g. cruelty) or evil pain (e.g. not getting something evil you want).


A person doing drugs, playing video games, or binge eating can be very happy while not flourishing. While it doesn’t make sense for someone to feel happy and yet not be happy, it makes perfect sense for someone to feel happy and yet be suffering, where suffering is the opposite of flourishing. Conversely, great pains are often necessary to obtain and maintain flourishing, and so you can be in pain while flourishing.


Shea says, like every other philosopher, that goodness is normative (12): “Theories of the nature of happiness explain why things are good by identifying the ultimate good-making features of lives, the normative properties that explain the truth of propositions like ‘G is good for S’ . . . .


Goodness/badness is not normative on my view, but I’ve already explained this so I’ll move on.


Shea contrasts two views: Subjectivism (“a good G is good for a subject S solely in virtue of S’s mental states or attitudes towards G”) and Objectivism, which is the denial of Subjectivism. Shea gives five theories of well-being: hedonism, desire satisfaction, objective list theory, perfectionism, and eudaimonism.


Hedonism = only pleasure is intrinsically good. Extrinsic goods are good because they lead to pleasure.


This theory is associated with Jeremy Bentham and John Stuart Mill. (And Epicurus, and Plato.)


Desire satisfaction = only satisfying one’s desires is intrinsically good. Extrinsic goods are good because they lead to desire satisfaction.


Two types: Actual desires versus ideal desires. I reject actual desire satisfaction theory because someone can fulfill their desires and still be miserable. Plus, someone could experience something and enjoy it, but it wasn’t one of their desires. Where is the goodness coming from? The desire theorist would have to say that the desire and its satisfaction occurred at the same moment. But why would a desire spontaneously come about in this way? Ah, it’s because of the pleasure of the experience.


Ideal satisfaction fares no better, because there is no way of knowing whether a desire you are pursuing (or that someone else has or suggests to you) is ideal or not, or whether a desire you satisfied lined up with an ideal desire.


And yet clearly someone who never satisfies any of their desires is not living a good life. Hedonism explains this: Everyone who experiences happiness desires it for its own sake, so someone who never has any desires satisfied is someone who is never happy.


Objective list theory = There is a list of intrinsic goods that are all irreducible. Pg 16: “Some widely recognized objective goods include friendship, knowledge, achievement, autonomy, beauty, pleasure, and virtue.” Some folks would add existence to this list, though I would not, because whether your existence is any good depends on the conscious experiences you are having or will be having in the future.


I reject this theory for three reasons:


1) It suffers an arbitrariness problem. Who knows whether you have added one item too many, or one too few?


2) It seems to assume that we cannot analyze these goods into a fundamental good, but it’s a matter of fact that I can analyze all these things into a unifying goodness.


3) It fails to provide a unified account of goods. A unified account is simpler.


This theory is associated with W. D. Ross, Derek Parfit, Christopher Rice, and Brad Hooker.


Perfectionism = What is good is the perfection or fulfillment of one’s nature, in our case our human nature.


“Human flourishing consists in the development and exercise of these capacities, such as the physical, intellectual, volitional, social, and emotional powers; and the realization of their corresponding ends, such as life and health, knowledge, free agency, friendship, and beauty. Our level of happiness is determined by the degree to which we fulfill these capacities and participate in these goods.” (16-17)


This theory runs into the immediate problem of evil human nature. I see evil as inseparable from human nature, and surely we don’t want to fulfill these aspects.


But even setting that aside, it’s not clear at all to me why this would be good. Apparently it’s the good consequences we see, the happiness (positive feelings) we obtain by participating in these goods, that makes fulfilling one’s nature good. Or it’s because these are good in an irreducible way. So this either just looks like hedonism or objective list theory.


This theory is associated with Aristotle and Aquinas.


The last of the five theories of well-being that the author considers in this book is eudaimonism. This theory says that the fundamental good-maker of a life is virtue, with virtues including justice, courage, temperance, practical wisdom, curiosity, and intellectual virtue (pg 17).


This theory is also associated with Aristotle, which must mean either that Aristotle was confused or that perfectionism and eudaimonism go together. Shea emphasizes that theism is compatible with any of these views or any combination of these views, and notes that pluralism (combining one or more theory) is an option (pg 19).


I don’t go for pluralism because a unified account is simpler, because hedonism easily explains all that seems good within the other theories, and the theories other than hedonism provide an incorrect analysis of what ‘intrinsic’ means. “Why is happiness (positive feelings) good?”The answer is “Because of the essence of happiness.” And ‘why’ questions stop there. But this is not the case with anything else. Why is friendship good? Because it leads to happiness, a kind of happiness that can’t be found elsewhere and the lacking of which produces misery, bad feelings, in us, and these bad feelings are worth avoiding because of their essence, because of what they are. We can repeat this for every alleged intrinsic good that isn’t happiness.


Part 2: Confusions over subjective/objective


I imagine a universe with nothing in it at all. Does it contain goodness of any kind? Of course not. I imagine another universe with stars and planets, trillions of galaxies, like ours, but there is not a single conscious creature, and from the birth of this universe to its heat death, not a single conscious creature ever comes about. Does this universe contain goodness of any kind? I say it clearly doesn’t.


Someone might think existence itself is good, but they won’t have any explanation as to why it is. Or they might think that the beauty of the stars and planets and awesome size of this universe, its orderliness, its mathematical structure, are all objectively beautiful features of this universe, and so this universe contains goodness despite never containing a single conscious creature. Again, I see no explanation for the goodness of any of this. You might suggest a modal goodness: If the right creature were to pop into this universe, then this creature would benefit from the order of the universe, such as by experiencing awe and wonder and beauty. This could explain the intuition that this universe is more beautiful or better than the universe with nothing in it at all, because there is no possible creature that could pop into an empty universe and proceed to experience happiness.


This thought experiment tells me that goodness is, fundamentally, something experienced. We see this clearly when we consider the so-called “objective” theories of well-being, and see how they all involve mind-dependence:


Objective list theory: Consider friendship, knowledge, achievement, autonomy, beauty, pleasure, and virtue: Which of these depend on mindedness / first-person properties / consciousness / experience / personhood? They all do!


Perfectionism: “Human flourishing consists in the development and exercise of these capacities, such as the physical, intellectual, volitional, social, and emotional powers . . .” (pg 16)


All of these capacities are clearly dependent on minds! Even our physical capacities stop when our minds are destroyed, and are only activated, usually, by our minds.


Eudaimonism: Virtue can be defined in terms of emotions, where the virtuous person feels the right amount of emotion, not too much or too little. Or virtue can be defined in terms of action, where the virtuous person performs the balanced action that is not too extreme on one side or the other. Shea defines virtue in the following way (pg 33-34): “Being virtuous involves having a good will: a will that wills, desires, chooses, and acts in accordance with what is truly good. Willing the good, having the other aspects of one’s character integrated around a good will, and acting in accordance with it, are necessary conditions of virtue. . . . the essence of virtue is having a good will that is rightly ordered and wills the good.”


All of these aspects of virtue are likewise mind-dependent. There is no virtue without experience.


So these so-called objective theories of well-being are actually quite mind-dependent or experience dependent. Just like hedonism and desire satisfaction? Well, not so fast.


One way of cashing out the objective/subjective distinction is in terms of properties and epistemic access. If something is subjective, then its truth or existence depends on first-person properties. But if something is objective, then its truth or existence depends on third-person properties. The moon is an object, it’s objective; the moon is made up of third-person properties. This means the moon is public: any person, or cameras, can see the moon. My memories are part of me, a subject, they are subjective; my memories are made up of first-person properties. This means my memories are private: no person, no technology, can access my memories except me.


If someone reports a subjective experience, they are giving a data report. As long as that data report contains no interpretation, and is just a pure data report, then that report cannot be false. Data can’t be mistaken; only interpretations of data can be mistaken. It is in this sense that introspection—a self-report of experience—is infallible, and any pure data report communicated to anyone else is likewise infallible.


So consider the truth of: “I love breakfast burritos”. Is this statement true? Yes. And no. It depends on who you ask. But now consider: “The moon is smaller than the earth.” Is this statement true? Yes, and it does not depend on who you ask. Subjective statements have this yes-no property, while objective statements have a yes-only or no-only property.


It is from this that we get this idea that subjective claims are infallible, but objective claims are fallible. But for every subjective claim, there is an objective claim about the truth of that claim.


To illustrate, let’s say I go to a party and I enjoy myself. But I black out and forget everything about the party. I also have a twin who, unbeknownst to be, was at that party, but they had a terrible time. A friend of mine sees my twin being miserable and, thinking it was me, tells me the next day how miserable I was. I take my friend’s word for it. My attitude and my belief with respect to my enjoyment of the party is that I did not enjoy it, even though I really did.


This illuminates two points. The first is that my attitude or belief does not determine whether an instance of happiness took place. I was in fact happy, but because of this scenario, I took on the belief / attitude that I was not happy at the party. If a co-worker asks me how the party went, I might say: “I did not enjoy it”, even though I in fact did. If I were being more sensitive to the truth, I would have said, “I don’t remember whether I enjoyed it, but according to my friend I did not.”


The second point is that while people can be wrong about their own instances of happiness, other people can also be wrong about what happiness has taken place. My co-worker might, because of what I say, fashion the false belief that I did not enjoy myself at the party when I in fact did.


People, even myself, can be incorrect about what happiness has taken place. In this sense, hedonism is objective. “Ben enjoyed himself at the party.” Is this statement true? Yes, and it does not depend on who you ask. It depends on the actual experience that actually took place.


This is why the mind reading fallacy is so frustrating:

 

“I saw that movie; I liked it!”

“No you didn’t.”

“What? Yes... I did. Why are you saying I didn’t?”

“No one liked that movie. You’re just saying that to be different.”

“...No, I liked the movie because of its writing. The setups and payoffs 

were—”

“Yeah, sure thing buddy.” 


What to do when faced with this kind of gaslighting? People can be, and will be, profoundly wrong about your own experiences, and because your experiences are private, there’s not much you can do. The objective fact remains that you had the experiences you did, and anyone who says otherwise is not only incorrect, but, from your vantage point, certainly incorrect.


Part 3: Highest good


Shea says that for Christians, the highest good is union with God. But whether someone has union with God, or is even capable of ever having union with God, depends on whether that person has a mind! Again, we find mind-dependence.


This matters because Shea tries to argue that while theism fits with any theory of well-being, theism fits better with so-called objectivist theories. All of this falls apart if it turns out that hedonism is, in some sense, objective, and if, in some sense, all of the so-called objective theories of well-being are subjective. This falls apart even further because hedonism is so plausible that if it really were true that God is evidentially incompatible with hedonism, then all the worse for theism.


One way to recover the intuitions surrounding this topic, is that what is extrinsically good or bad is objective. Drinking a vial of acid is extrinsically bad regardless of anyone’s opinion, because the pain that would result from drinking a vial of acid is intrinsically bad. People can be wrong, and often are wrong, about the good or bad consequences of things. So people can be wrong, and often are wrong, about what it takes to flourish, to exist in an idealized condition that maximizes extrinsically good happiness and minimizes pain that fails to be extrinsically good.


It is absurd to think someone could enjoy the highest good, union with God, and thus be maximally happy, while feeling miserable. So again, non-hedonism leads to absurdity. Again, this is the problem with any theory that denies happiness as the final good: if there is some other good that is more fundamental, then we could imagine someone being so miserable that they would prefer death to life, and yet because they have this other good, they are “objectively” happy.


I can imagine an evil God giving me this deal: When you die, either you will be tortured every day for eternity in hell, or everyone else will. You can choose to peacefully cease to exist forever at the infinite expense of everyone else, or you can sacrifice yourself to save all of humanity.


On a virtue-first view, you should sacrifice yourself and enjoy your infinite virtue. But what does this “enjoyment” entail? It entails finding yourself stuck in a worst possible evil, the kind of evil that cannot possibly be justified: a state where every moment you wish for death but cannot die, and this goes on forever. On the other hand, if you pick the selfish action and cease to exist, your selfishness is of no concern to you.


This demonstrates what the real moral concerns are to conscious creatures. The deepest moral concern for a conscious creature is to avoid a worst possible evil at all costs. We can be grateful that there is no evil God to force such a choice on anyone!


Plus in order to be unified with God you would need to love God and be in a relationship with God, but this relationship would be impossible if you are in terrible pain and you see God not caring about your pain. Why might God not care about your pain? Because not only can you be happy without intrinsically good experiences, you can be maximally happy without intrinsically good experiences. This shows the incoherence of separating out maximal goods from intrinsically good experience.


But if happiness must come first before relationship with God is possible, or if happiness is necessitated by a relationship with God, then this points to happiness as being the fundamental good.


On pg 22 Shea says that maximal pleasure, apart from the union with God, will not make someone perfectly happy. Maybe this is true if the pleasures being maximized are lower-order pleasures. But think of what a relationship with God entails. These things absolutely would produce unique and extreme positive feelings. That’s why we can imagine someone being happier, even happiest, by being in union with a perfect being.


Blaise Pascal: “The Stoics say: ‘Withdraw into yourself, that is where you will find peace. And that is not true. Others say: Go outside: look for happiness in some diversion.’ And that is not true . . . Happiness is neither outside nor inside us: it is in God, both outside and inside us.”


Hedonism can make sense of the idea of happiness being both inside and outside us. First, intrinsic goodness is inside us in the sense that it is a first-person property and something experienced directly. Second, happiness is inside us in the sense that introspection, self-honesty, integration of the shadow (a Jungian idea), letting go of negative feelings, and so on, are meditative practices that occur within us. Third: Happiness lies outside of us in that some of the best feelings we can feel are tied to senses of home, community, belonging, usefulness to others, being loved by others, viewed as valuable by others, and feeling well-integrated into a social system.


I imagine the stoics would have some choice words with Pascal’s lazy remarks against stoicism. Even a cursory reading of the stoics reveals the stoic ideals of being kind towards others even when they are unkind to you, upholding your duties to others without complaint, and behaving and speaking blamelessly around others so that there is nothing they can say against you. It’s patently false to characterize stoicism as isolating oneself from society and finding peace only within. Don’t let the foolishness of others get to you, and don’t rely on the judgments of others for your happiness, the stoic would say, which is perfectly sound advice. But happiness for the stoic absolutely is placed in following Nature’s path for you, which probably will involve working with others to some extent.


Next, I have no idea what it means to say that our happiness is inside God. Does that mean God doesn’t make us feel happy? That can’t be right. Okay, but our feelings are in a sense inside us. So admitting that God makes us feel happy is to admit that our happiness is inside us. Maybe it’s saying that the source of our feelings of happiness lie in God. But that’s not true either. I have already explained how belief in God produces misery for some of us. And I mentioned the ways union with God would make us extremely happy, but no one on earth has that kind of union with God, so that happiness is irrelevant to us earthlings.


What is the highest good? What is the priority of goods?


This hierarchy can be objective in hedonism because some things just do produce more happiness than other things. I imagine someone struggling to decide whether to go to the party or stay home. Staying home is the low risk low reward strategy, but going to the party is higher risk higher reward. This person decides that the party will involve drinking and drinking games with strangers, and knowing that they don’t like this, they stay home. But the next day a friend sends a video of the party, and they had Guitar Hero and Super Smash Bros set ups and people were playing games, and Bob realizes that he would have had a blast had he gone to the party. Going to the party was the better choice and Bob’s choice of staying home was incorrect.


But in another sense, talk of a hierarchy of goods seems silly since it’s obvious that this will differ from person to person. For one person, achievement in ballet is of top priority, for another person it’s achievement in tennis. What matters on utilitarianism is what makes someone in fact happy. We could try to extract from these certain universals of happiness, like that happiness from achieving something great is highly prized and worth pursuing. So hedonism can account for a hierarchy of goods if you want. Certainly, hedonism better accounts for our deepest moral concerns, like the concern of avoiding maximal evils.


For some people death is a special evil because 1) It is inevitable and 2) It destroys all possibility of future happiness. Life can feel absurd and pointless given that one day it will all just end forever. What was the point? People who aren’t bothered by existential questions can focus on other things. But people like me who are more preoccupied with death and what it means for the meaning of life, defeating death in some sense is of a high priority. That’s where ataraxia comes in. So for some of us, ataraxia is the summum bonum or highest good.


When it comes to figuring out what the summum bonum is of your life, often people will have us imagine being on our death bed; what would you regret most if you didn’t get it done? Then pursue the answer to that question. But that answer will differ massively from person to person, in the details if not in the structure.


On pg 27 Aquinas says that God is the final end, but on pg 1 Aquinas says that happiness is the final end. Curious...


Pg 1: “man’s last end is happiness which all men desire” ; “man must, of necessity, desire all, whatsoever he desires, for the last end”.


Pg 27: “God is the last end of man and of all other things . . . [and] man and other rational creatures attain to their last end by knowing and loving God”.


Part 4: Rapid fire


  • Three orientations of optimism:

    • Optimism = perfect and imperfect happiness are possible

    • Mixed = only imperfect happiness is possible

    • Pessimism = neither is possible

    • In this life, it appears that mixed is the right attitude for Christians and non-Christians alike. Though pessimism will be true in some cases.

  • 56 Man is made happy by God alone — this is clearly false even from a Christian point: Christians are made happy by basic and social goods… if it turns out God is not real these still made the Christian happy all along. Man is made perfectly happy by God alone – that’s fine. 

  • I agree that Christianity, or any worldview that promises eternity with a personal perfect being, can offer perfect happiness, and other worldviews that offer only impersonal states of bliss will lack the individuality, freedom, and sense of love and acceptance we long for.

  • Imperfect happiness is precarious on theism as well… many Christians live poor lives despite their faith.

  • If God wanted to be glorified, for those who believe to stand out, then happiness could be one way to do this.

  • You might say perseverance despite pain should be more expected but if that’s the case then all Christians should suffer horribly to demonstrate God’s strength… but this doesnt work because many Christians are happy (for naturalistic reasons) plus it would be cruel to torture Christians just so they could prove their virtue (though God does this to Job).

  • The problem is that humans look toward happiness to see what works, and by extension what is true. If non-Christians see that Christianity doesn’t work then they will assume it’s not true. At least pragmatically it’s not true, and many humans are by necessity pragmatists.

  • It is very strange that God would create us or allow us to evolve into pragmatists in this way only for Christians to not only not be pragmatically differentiated positively in any supernaturally gifted way, but if anything it is the opposite (but this could be a selection effect: unfortunate people gravitate toward religion).

  • We can reconcile pragmatism with a property reference theory of truth when we extend value properties to truth: it is true that I would be happy if such and such, and therefore that is the more relevant truth.

  • 59 Theism is not the best to live in because of the agony it causes both from the pain of belief and the pain of love.

  • 59 There is no god’s offer in any undeniable tangible sense. God has not visited me in a dream or through an angel. There are only reports of events in the Bible and all of that is consistent with naturalism.

  • While I would love to take up God’s offer for salvation and happiness, this offer needs to be made in a real way and not in a way as out there and disconnected as being in a book, especially a book as flawed and problematic as the Bible, full of human errors and compiled by human authors.

  • Even if I were offered that doesn’t mean there is free choice. How could someone freely choose to be unhappy? That makes no sense. I don’t choose to see how the problem of evil renders belief in God irrational, but I see it all the same. And that sight makes it impossible for me to believe, so there is no choice.

  • 60 Knowing and loving God is the greatest good but it is impossible to know and love God while experiencing a worst possible evil or maximal evil.

  • While a best possible good is union with a perfect being, because of the unique and ultimate kinds of happiness this would entail, a maximal good would be any state where you flourish forever (or flourish for the maximum psychologically viable amount of time).

  • 61 I agree union with God supports pro-theism.

  • I agree that if heaven is union with God then there is no such thing as secular heaven. But to be charitable we can imagine heaven defined as an eternal state with all imagined virtuous goods being delivered.

  • Hope in God can lead to disappointment and crushing loss and complacency in this life – a kind of learned helplessness and over reliance on God sorting everything out.

  • Hope is primarily an act of imagination: see the future you want and wonder how it might happen. If something seems too good to be true, it’s hard to imagine it happening, and thus hard to hope for.


Wednesday, June 25, 2025

The Absurdity of Life Without God (June 2025)

 
1) Is Craig saying that all humans prior to Christianity should have thrown themselves off cliffs in despair over the meaninglessness of their lives? Because that would be a clearly false thing to say.
 
2) In response, Craig might say something to the effect of "Humans prior to the revelation to the Jews or prior to the Gospels could have believed in God as revealed by creation."

But this would be a bad response for the following reasons:

A) Craig himself says that you need God and an afterlife for reality to be ultimately meaningful.[*1] But Orthodox Judaism doesn't teach an afterlife, and no clear teaching of the afterlife can be found in the Old Testament. So really, even belief in the God of the Old Testament, the true God, is not enough on Craig's view for life to be meaningful. I'll say that again: Even believing in the true God is not enough to live a meaningful life on Craig's view! So all the figures of the Old Testament were living meaningless lives, including Joseph, Abraham, and Moses? Really?
 
B) The God revealed by creation is, like Hume points out, not clearly good nor evil, as life is rife with both good and evil. But if the God of creation is not clearly good nor evil, and is apparently indifferent to both our suffering and our joy, then there's no reason to think there will be an afterlife for our sakes.

More importantly, if there is no report of an afterlife revealed by God in a credible way, then there is no reason to think there is an afterlife. It would be pure speculation. So...
 
3) ...would Craig say it's okay to live a life that might be meaningful on speculation? Does life have to be absolutely certainly known to be meaningful (i.e. does God’s existence and an afterlife have to be known with certainty) for a person to rationally live it?

Surely Craig would not set the standard that high. Indeed Craig is infamous for saying that when it comes to pragmatic reasoning, the standard can be extremely low.[*2] As long as there is some chance that there is a god out there and an afterlife out there, then it's reasonable to live according to that chance. So as long as atheists aren't absolutely certain that there is no god and no universalist afterlife, as long as they believe there is a non-zero chance of these things, then they can live on the same kind of leap of faith that Craig champions when he says Christianity is worth believing in even if there were only a one in a million chance of it being true. And many atheists would admit that there is some chance of such a universal salvation, however small.

4) Is a naturalistic worldview unlivable? No! And shouldn't Craig know better, having debated however many naturalists at this point, who all clearly do not find naturalism to be unlivable? Is Graham Oppy, a “scary smart” atheist scholar, somehow irrational for living as a naturalist?

Craig claims that naturalists live as if their lives have meaning, but have no basis for this meaning. But that's not only mistaken, but I'd claim certainly mistaken. The basis for meaning that naturalists have is the same basis that all humans prior to Christianity had, and it’s the same basis that, ironically, even Christians have for meaning.
 
Why do Christians live their lives? Do Christians receive a letter from God in the mail that details their purpose on earth? Or do Christians receive a vision or a dream, or an auditory message from God that details their purpose on earth? Nope. Christians are left to figure things out on their own, the same as everyone else.
 
And so inevitably Christians end up living for: their jobs, hobbies, entertainment, family, friends, exploring the world, because their biology generates an internal pressure to survive, and so on, exactly the same reasons humans have always had for living.
 
You might say that Christians have uniquely Christian jobs like pastor, missionary, and Christian philosopher, but that's only very few Christians. Most Christians are like everyone else: Working some miscellaneous job that puts food on the table for the family. (By the way, why is God so okay with his followers working mundane jobs for decades and decades, knowing what that does to the soul, I have no idea.)
 
We are told in Revelation that in heaven there will be no more death or suffering. We are told that hell is a place of torment. This is a strikingly hedonistic system of value. If Christianity were anti-hedonism, then we could imagine heaven being filled with pain and hell being filled with happiness. After all, if it's things other than pain and happiness that form the basis of value, then heaven could be filled with those intrinsically good things (whatever they are) along with pain, and hell could be filled with those intrinsically bad things (whatever they are) along with happiness.  
 
As it stands, we don't find that description of heaven and hell in the Bible or in Christian tradition. So we're left with a hedonistic picture of Christian value. But if hedonism is true, then happiness forms the basis of meaning. That which is meaningful is that which makes life worth living, and vice versa (this is the meaning in life sense of meaning). Happiness makes life worth living. So that which imparts happiness imparts meaning. And this is exactly what we find in the world: all human motivation can be understood in terms of pursuing certain kinds of happiness and avoiding certain kinds of pain.
 
The reason why I say that it's certainly the case that life is meaningful is because not only is it certain that we experience happiness, but because it is certainly the case that our actions make a difference (this is the difference-making sense of meaning). Craig claims that our lives make no ultimate difference if death is the permanent end. But there is a difference, and a certain one at that, between happiness and pain. The real moments of real flourishing that real people really have—that's the difference-maker, and it's a difference that we have direct access to via immediate experience.[*3]

5) So a naturalistic worldview is certainly livable for the same reasons that life in general is livable, including Christian life. But is a Christian worldview livable? A person can find Christian worldviews to be unlivable for the following reasons:

A) To be a Christian you must select a denomination but it can seem like there are no good reasons to select one over the others.
 
B) When you try to do theology to discover which denomination is best, you discover that there are severe challenges to the coherence of all Christian doctrines, including the doctrines of God, the Trinity, the Incarnation, the Atonement, Salvation, Sin, Eschatology, Heaven, Hell, Creation, Faith, Ecclesiology, etc. 
 
B) There are moral horrors in the Old Testament, horrors that Craig happily defends.[*4]
 
C) Jesus says things that are arguably straight up false, including His teachings on divorce (Mt. 19:9), that the "meek shall inherit the earth" (Mt. 5:5), that "whoever is not with me is against me" (Luke 11:23), "how much more will your Father in heaven give good things to those who ask him" (Mt. 7:7), and "the one who believes in me will also do the works that I do and, in fact, will do greater works than these, because I am going to the Father." (John 14:12).
 
On that last one you might try to wriggle out of it by saying that it refers to only the disciples, but a) it specifies "the one who believes in me", not just the disciples, and b) the disciples did not go on to perform greater works than that of Jesus.
 
You might respond by saying "works" refers to spreading the gospel, and "greater works" refers to how greater numbers of people will be reached by the gospel than what Jesus reached during His earthly ministry. But the term for works, τὰ ἔργα, found in John 14:11, refers to miracles. 
 
D) If someone is committed to a pragmatic theory of truth, and if being a Christian is pragmatically false, then Christianity is false for that person. Some people have found being a Christian to be detrimental to their mental health (religious trauma, hell anxiety, etc.) and success in life. (Why would God give us this heuristic of looking to what works for guidance on what to believe and what to do with one’s life and then allow for Christianity to not work for so many people, I have no idea.)
 
E) Christianity commits one to unbelievable supernatural elements, including:
 
E.1 - Figures in the Old Testament living to hundreds of years;
E.2 - The Nephilim;
E.3 - The Divine Council;
E.4 - Angels;
E.5 - Demons;
E.6 - Satan as a demonic ruler of the world;
E.7 - Hell as a literal, physical place;
E.8 - Heaven as a literal, physical place;
E.9 - The bread and wine of the Eucharist being the literal body and blood of Jesus, if the Catholics are right about transubstantiation;
E.10 - Various miracle stories like talking animals, the flood, the plagues, Jonah and the Fish, pillars of fire, the miracles of Jesus, John's Revelation, etc.
 
F) Many folks who are LGBT report experiencing Christianity to be unlivable, and even non-LGBT folks find Christian ethics to be impractical and naive.
 
G) Infernalistic versions of Christianity are seen as unlivable because a) it's impossible to socialize with people you believe are going to hell; b) it's impossible to believe that the large majority of humanity is going to hell, including close family and friends; c) it's impossible to envision one being happy in heaven knowing so many people, or even a single person, is in hell.
 
6) Speaking of hell, life in hell is, if the accounts of the Bible and tradition accurate, not worth living. A life not worth living is a meaningless life. So life in hell is a never-ending meaningless life! So Infernalistic Christianity is far more guilty—infinitely more guilty—than naturalism of producing years of meaningless existence. If God as a perfect being entails that all existence is meaningful, and if life in hell is not meaningful, then God's existence entails that infernalism is false and there is no hell, an indictment of orthodox Christianity.
 
7) Not only does naturalism not entail a meaningless life, but Christianity does not entail a meaningful life. Christian belief can cause the believer to develop a sense that this life is pointless, because life doesn't truly begin until the end of the world and the new heaven and new earth come. This can cause the Christian to develop a lifestyle of passivity, of waiting for the end of the world. This is exacerbated by the pain of effort and risk of injury. Ambition and achievement go out the window, and the Christian lives an empty life waiting for God to do something or waiting for the Rapture – for life to really start. How tragic!
 
If Christianity ends up false, then these Christians will have wasted their one chance to fight for meaningful experiences in this life. Even if Christianity ends up true, it's still the case that these Christians failed to live well in this life. God, sensitive to these things, should encourage Christians to live for this world, say, by granting special protections to the Christian, allowing them to live more fearlessly. Instead, God allows Christians to be persecuted, martyred, and ridiculed for their beliefs. (And allows them to end up stuck in mundane jobs, as mentioned – an important point, considering how meaningless working a mundane job is, at least for those of us who dream bigger. Let me put it this way: Personally, if God revealed himself to me and gave me a dream job, I would believe in Him and devote myself to Him in a heartbeat, because that would be a fast way to know that God is real. Ironically though, such a dream job would involve doing philosophy research full time, research that happens to have led me to the conclusion that Christianity is almost certainly false).

8) Craig worries about atheists living an inauthentic life. Surely Craig can appreciate the fact that there are Christians and even pastors who live inauthentically? There are testimonies of pastors and seminary teachers who lose faith but keep the Christian mask on to keep their employment. That’s an inauthentic life, not because it’s inwardly atheistic, but because it’s inwardly atheistic in combination with being outwardly Christian!
 
If the concern is strictly with authentic living, then you would demand many people to leave Christianity, because their Christian life is not authentic. It is exactly because of problems of authenticity (both in terms of one's own cognitive dissonance as well as the observed cognitive dissonance in other nominal Christians) that many people stop going to church and leave religion altogether. How many of us have experienced the inauthenticity of Christians, who preach one thing but practice another? I suspect it is exactly because of the problems mentioned of the livability of Christianity that results in these hypocrisies. The falsity of Christianity causes a clash between reality and the Christian's beliefs, and these clashes often manifest in contradictions in the Christian's attitudes and behaviors.
 
Living authentically includes living according to what you believe to be true, and not according to what you want to be true or according to what people around you pressure you into believing. The echo chambers of church life can produce intellectual dishonesty. The desire to be with God, for heaven to be real, for there to be ultimate justice, and the desire for one's devotion to a religion to have not been a waste, can each produce bias that encourages someone to dishonestly stay in their worldview. If Christians were honest, they would realize that 1) They want Christianity to be true more than anything, and 2) This produces a deep bias that seriously compromises the intellectual honesty of the Christian. Do you truly actually believe that Christianity is true, or are you just in it out of fear of death, or desire to see a loved one again? (I don't mean this in a patronizing way in the least. When I was a Christian I wanted to be with God more than anything, and in some sense I still feel that way, although I also grapple with Graham Oppy's remarks on the irrationality of wanting God to exist. See "Naturalistic Axiology", Chapter 5 of Four Views on the Axiology of Theism.)

 *1 - See Reasonable Faith, Third Edition, pg. 74: "So it's not just immortality man needs if life is to be ultimately significant; he needs God and immortality. And if God does not exist, then he has neither."
 
 
*3 - You might think of flourishing and suffering as more sophisticated and involved notions of happiness and pain, and it's really flourishing, not happiness per se, that we should maximize, and it's really suffering, not pain per se, that we should minimize. A very rough approximation of flourishing might be like the following:
 
A human is flourishing when:
 
1) Their basic needs are met, such as food, clothing, shelter, and medical care.
 
2) Their more advanced psychological needs are met, including feeling accepted by and well-integrated into a community.
 
3) They experience happiness on a regular basis.
 
4) They do not experience pain on a regular basis.
 
5) The pains they do experience are instrumentally good, such as the natural pains that accompany self-improvement and the establishing and maintaining of a eudaimonic system. The instrumental goodness easily outweighs the intrinsic badness of these pains. In other words, they do not experience higher-order pain, only lower-order pain.

6) The happiness experienced is instrumentally good and not instrumentally bad. In other words, they experience higher-order happiness, not just lower-order happiness.
 
Ditto, mutatis mutandis, for suffering. Note: I'd claim that we have direct access to whether we are happy or in pain, but we don't necessarily have direct access to whether we are flourishing or suffering.
 
*4 - See "W.L. Craig Defends the Slaughter of Canaanite Children" on the @CosmicSkeptic YouTube channel.