Arguments Pro and Con

Creation declaring the power and deity of God

“Ever since the creation of the world his invisible nature, namely, his eternal power and deity, has been clearly perceived in the things that have been made.”

This page sets out the case on both sides. Not the caricatures each side keeps of the other, but the arguments as their best defenders actually make them. The reader can then judge which way the evidence leans, which is the only judgment worth making here.

The question is whether belief in God is reasonable — whether it is a blind leap or a conclusion the world we live in supports. That is a different question from what the word “God” means, which is taken up on the companion page What Do We Mean by “God”? A definition has to be settled before an argument about existence can even begin.

The case against is led by the oldest and hardest objection there is, and Ivan Karamazov gives its temper in Dostoevsky’s great novel: he does not deny that God exists so much as refuse to accept the world on His terms. Put as a dilemma, it runs this way — if God is able to prevent suffering and unwilling, He is not good; if willing and unable, He is not almighty. The world is full of suffering, a great deal of it falling on people who did nothing to deserve it. That objection is weighty enough to have a page of its own, Could God Permit Evil?, and alongside it stand the objections that every proof of God has been answered, that nature explains itself without remainder, that God stays hidden when He could simply appear, and that the sheer number of rival religions tells against all of them.

The case for begins where Saint Paul begins, in the verse above: God is not hidden knowledge, reserved for the initiated, but something the world itself makes plain to anyone who looks at it. It runs from the existence of a universe that did not have to be here, from its order and its strange openness to being understood, from the reality of moral truth, and from the testimony of conscience and religious experience. Not one proof that compels, but several lines of evidence that converge.

I invite your engagement with me on these questions. You may leave comments below, but please be sure to read our policy on commenting before doing so.

Atheist/Skeptic View

Jump to the Catholic View ↓

Unbelief, as those who hold it describe it, is not a refusal to think about the question. It is the result of having thought about it, and of concluding that the arguments for God do not hold up.

The Problem of Evil

The skeptic’s oldest argument is the Epicurean dilemma, as Hume restated it. A God who can prevent suffering and will not is not good. A God who would prevent it and cannot is not almighty. The world is full of suffering. So one of the three claims, the skeptic concludes, has to go: the power, the goodness, or the God.

He knows the usual reply — that freedom is worth its price, that love which could not be refused would not be love — and answers, with J. L. Mackie and William Rowe, that it covers only part of the ground.1 It explains the torturer; it does not explain the tumor. A child dying of bone cancer is nobody’s free choice, and an earthquake arriving under a sleeping city is not the abuse of anyone’s liberty. Some suffering may buy something, the skeptic allows, but much of it buys nothing anyone has been able to name, and it is that remainder he presses.

Every Proof Has Been Answered

The cosmological argument — the argument from cause — in its careful form, reasons that whatever might not have existed needs an explanation outside itself. The skeptic’s serious answer is twofold: that this Principle of Sufficient Reason is itself an assumption, never proven; and that even granting it for things inside the universe, inferring that the whole of contingent reality needs an outside explanation commits the fallacy of composition — every brick may be small without the wall being small. Russell put the resting position bluntly: the universe “is just there, and that’s all.”2

The teleological argument — the argument from design — he holds, was answered by Darwin, who showed how the appearance of design can arise without a designer. Its modern replacement, fine-tuning, he answers either with a multiverse or by noting that observers can only ever find themselves in a universe that permits observers — a selection effect he extends to the universe’s mathematical obedience, since minds evolved in an orderly world will find order, with a net of their own weaving. And the moral argument, on this account, mistakes an evolved social instinct for a voice from outside: cooperation pays, and creatures that felt obligation left more descendants than those that did not.

The Silence, and the Crowd

Beyond the arguments, the skeptic points to the silence — the argument from divine hiddenness — and J. L. Schellenberg has given it its careful form: a perfectly loving God would see to it that no one open to Him fails to believe He exists; yet reasonable nonbelief plainly occurs. A God who wanted to be known could be known; He could say so, plainly, to everyone, and end the matter in an afternoon.3 What we find instead is ambiguity, which the skeptic reads as what absence would look like.

He points as well to the pattern of explanation. Every gap once occupied by God — disease, weather, the origin of species, the origin of the cosmos — has been filled by something else, and he sees no reason to expect the remaining gaps to end differently. And there are thousands of religions, each held with conviction, almost all of which must be false — the argument from religious diversity. The believer, the skeptic observes, already applies to every religion but his own exactly the skepticism the unbeliever applies to one more.

None of this claims certainty. The skeptic asks only that the evidence be as good as the claim is large, and judges that it is not.


Endnotes
  1. J. L. Mackie, “Evil and Omnipotence,” Mind 64 (1955); William L. Rowe, “The Problem of Evil and Some Varieties of Atheism,” American Philosophical Quarterly 16 (1979). The argument is treated at length on the theodicy page.
  2. Bertrand Russell, in the 1948 BBC debate with Frederick Copleston: “I should say that the universe is just there, and that’s all.” On the fallacy-of-composition objection, see e.g. Paul Edwards, “The Cosmological Argument” (1959).
  3. J. L. Schellenberg, Divine Hiddenness and Human Reason (Cornell, 1993).

Catholic View

No single argument here is meant to compel. What follows is a convergence: several independent lines pointing the same way, none decisive on its own, and together harder to set aside than any one of them. Saint Paul claims this is how it has always been: that God’s “eternal power and deity” are “clearly perceived in the things that have been made” (Rom. 1:20). Not proved by a syllogism. Perceived, in what is already there.

Why There Is Anything at All

The oldest of these is the cosmological argument — the argument from contingency. The universe did not have to exist. Nothing about it explains why it is here rather than absent; it is the sort of thing that could have failed to be. Whatever is like that needs something outside itself to account for it.

The objection is that this exempts God from the rule it just laid down. It does not, because the rule was never “everything has a cause.” It was that whatever could have failed to exist needs a cause. God is not one more item of that kind; that is the entire content of the word, as the companion page on what we mean by “God” sets out. To ask who made God is to ask who made the thing that by definition was not made.

The careful skeptic presses two sharper points, and both deserve answers. That the Principle of Sufficient Reason is unproven: true, but rejecting it costs more than theism — all inquiry, science first of all, runs on the expectation that things have explanations, and a skeptic who abandons that expectation at exactly one door has stopped reasoning at the moment reasoning became inconvenient. And the argument needs only the modest form: not that everything must have an explanation, but that a thing which could have one and exists anyway invites the question. That inferring the whole’s contingency from the parts is a composition fallacy: some inferences of that shape fail, but this one does not, because contingency is the kind of property that survives assembly. A chain in which every link hangs from another does not hold itself up however long it grows; a stack of IOUs, however tall, never adds up to cash. If every member of the collection borrows its existence, the collection has nowhere to borrow from — and “it is just there” is not an answer to the question; it is the decision to stop asking it.

Could the universe itself be that thing? It could, if it showed the marks of it: not changing, not assembled from parts, not one item among others. It shows none of them. It changes constantly, it is made of parts, and every part of it depends on the rest. Graham Oppy, among the ablest living atheist philosophers, takes the other road and calls the universe’s initial state necessary. The reply is not to deny that the move is available but to notice its price: the initial state is still a particular physical arrangement that could, so far as anyone can tell, have been otherwise, and calling it necessary asserts what the argument asks to have shown.

This is the argument from contingency, and it should be told apart from its better-known cousin, the kalam argument, which turns on the universe having a beginning. The contingency argument would stand if the universe were eternal; it asks not what started things but what keeps anything in existence at all. The kalam argument has its own strengths and its own hostages to cosmology, and the full essay treats it on its own.

A World That Can Be Understood

This is the teleological argument — the argument from design — in its modern form. Darwin explained the appearance of design in living things, and explained it well. He did not explain, and never claimed to, why there is a universe whose laws hold steady enough for evolution to work in.

That is what fine-tuning presses. The constants governing physics could have taken almost any values, and nearly all of them give a universe with no chemistry, no stars, nothing that lasts long enough to matter. A subtler objection deserves stating: that with no way to assign probabilities over an infinite range of possible constants, “improbable” has no defined meaning. The comparative form of the argument survives it: whatever the measure, a life-permitting universe is far likelier on theism than on a single chance universe, and that comparison is all the argument needs. The multiverse answers by multiplying universes until ours is unremarkable: a very large purchase — an infinity of unobserved worlds plus a generator whose own laws invite the fine-tuning question over again — and whatever indirect motivations some models claim, the explanatory cost is paid up front to avoid one conclusion. And the reply that we could only find ourselves in a life-permitting universe is true but idle: that I could only notice the firing squad missed if it had missed does not make the missing unremarkable.

A second argument sits inside the first, the argument from intelligibility. Stranger still is that the universe can be understood at all. Mathematics worked out for its own sake, with no eye on the world, keeps turning out to describe the world exactly. That is not what you would expect of brute matter with no mind behind it. And the selection effect does not reach this one: survival required minds that track middle-sized objects — fruit, predators, faces — not minds whose idle abstractions anticipate the tensor calculus a century before physics needs it. An orderly world explains why evolved creatures find some order; it does not explain why the deepest order keeps answering to the games mathematicians played for beauty’s sake.

The Fit Between Feeling and Flesh

A newer argument, the psychophysical harmony argument, presses a fact so familiar it is easy to miss: the states of the body and the states of the mind are matched, and matched helpfully. Injury feels bad, and the badness is what pulls the hand from the flame; food and rest feel good, and the goodness is what draws us toward them. Our experiences make our reports about them true, and reasoning — run on this strange stuff called consciousness — arrives at truths. None of that had to be so.

The physical facts leave the pairing open. The same nerve signal and the same withdrawal of the hand could have been wired to pleasure, or to nothing felt at all; a creature whose burns delighted it would snatch its hand back all the same and live to breed. Across the range of ways feeling could be laid over function, almost all are useless or perverse, and the world runs on the sliver that fits. That harmony, as Brian Cutter and Dustin Crummett have recently argued, is what a good Mind arranging things would produce, and what blind law gives no reason to expect.

Selection will not close the gap, because selection grades behavior, not feeling: it can shape which inner state makes an animal flee, but it is blind to whether that state feels like agony or bliss, and the disharmoniously wired creature passes every test survival sets. Nor does it help to call feeling simply identical to function, since the naturalist’s own hard problem is the admission that it is not. The argument proves no Designer; it says the fit between mind and world is one more thing better explained by a Mind than by matter left to itself.

The Weight of Right and Wrong

This is the moral argument, and it turns on a distinction the objection blurs. Evolution can explain why we feel obligation. It cannot explain why some things are wrong. Those are two different claims, and the objection slides from one to the other without noticing.

If the moral sense is only inherited instinct, then torturing a child is not wrong; it is merely something we are built to dislike, as we are built to dislike bitter flavors. Yet the man who calls morality an evolved instinct still means it about the world, not about his own wiring, when he says cruelty is wrong — the conviction outruns the theory that explains it away.

Where the Objection Is Strongest

The problem of evil is the hardest thing said against belief in God, and a believer who pretends otherwise forfeits his credibility. Three things can be said in reply, and the first is a concession.

Freedom is worth its price. Love that could not be refused would not be love, and a world of creatures able to love is worth more than a world of well-behaved machinery. But the objection is right that this covers the torturer and not the tumor. It answers the evil we do. It does not answer the evil that simply happens.

Second, what looks purposeless from inside time may not be. We see a fragment and pronounce on the whole. This is a real answer, and a limited one; offered by itself to someone in grief it is cold comfort, and should not be offered by itself.

The third is not an argument, and it is where Christianity actually differs from every other answer on offer. The claim is not that God explains suffering from a safe distance, but that He entered it (was betrayed, tortured, and executed) and turned it, in the Resurrection, toward redemption. That does not make evil good or grief lighter. It means the sufferer is not addressing someone who has never been where he is.

Why God Does Not Simply Appear

The argument from divine hiddenness asks why a God who wants to be known stays so quiet. The tempting reply — that unmistakable evidence would force belief and so destroy freedom — is one this site’s own evidence forbids. God has sometimes appeared unmistakably: to Paul on the Damascus road, to Thomas with the wounds held out — and neither man’s love was thereby forced, as Judas, who watched three years of miracles and left, proves from the other side. What evidence compels is at most belief that; and belief-that was never the object — “even the demons believe, and shudder” (Jas. 2:19). What God seeks is trust, which no theophany can force, and He measures His self-disclosure to persons as He wills, judging each by the light he was given (Luke 12:48). The believer’s claim is not that God hides, but that He courts rather than conquers — and that those who sought Him with the seriousness the question deserves have not, on the record of the ages, found silence.

As for the many religions: that they conflict shows most are wrong somewhere, not that all are wrong everywhere. Physicians disagree, and medicine is not thereby false. What is striking, once you look, is not how much the traditions differ about who is divine but how completely they agree about what ‘divine’ means.

The pattern of gaps closing is real, and worth conceding. But every explanation science supplies is an explanation of how something within the universe works. None of them touches the question of why there is a universe with anything in it to explain.

The Reply in Brief

No line here forces assent, and none is offered as forcing it. The claim is only that a universe which did not have to exist, which runs on constants that did not have to permit us, which yields to mathematics it had no reason to obey, in which feeling is fitted to flesh as though on purpose, and in which cruelty is actually wrong, is better accounted for by a Creator than by nothing at all.

The problem of evil remains the strongest objection, and it is not dissolved here but weighed. Set against it is a world containing creatures who can genuinely love, and a God who did not stay out of the wreckage but was nailed to it.

The full essays take each strand further than a panel allows: the argument from contingency in the form Aquinas actually gave it, the fine-tuning figures and what the multiverse would have to cost, why selection can grade behavior but never the feeling laid over it, why the moral argument survives every evolutionary account of moral feeling, and the long Christian literature on suffering: Augustine, Aquinas, and the modern replies to Hume.

Summary

The question is not whether any one argument settles the matter, since none does on either side, but which way the whole body of evidence leans once the strongest case has been made both ways.

The problem of evil is the hardest objection, and it is not dissolved here. The Epicurean dilemma stands: a God able to prevent suffering and unwilling is not good; willing and unable, not almighty. Freedom answers the evil we do to each other. It does not answer the child’s tumor or the earthquake under a sleeping city, and any reply that pretends otherwise is not worth hearing.

What Christianity offers there is not mainly a theory. Some suffering that looks purposeless from inside time may not be, and that is worth saying once and not leaning on. The distinctive Christian claim is that God did not explain suffering from a safe distance but entered it, was executed, and turned it toward redemption. Evil is not thereby made good. The sufferer is simply not addressing someone who has never been where he is.

“Who made God?” misreads the cosmological argument. The rule was never that everything has a cause, but that whatever could have failed to exist needs one. God is not an item of that kind. The universe, on the other hand, changes, is made of parts, and has every part depending on the rest, which is exactly the profile of something that needs accounting for.

Darwin explained the appearance of design; he did not explain the stage. He accounted for living things without a designer, and never claimed to account for a universe whose laws hold steady enough for evolution to work in. The teleological argument, in its fine-tuning form, presses that question, and the multiverse answers it by buying an infinity of unobserved worlds — and a world-generator that raises the same question again — to make ours unremarkable. Even granting that probabilities over infinite ranges are ill-defined, the comparative point stands: such a universe is far likelier on theism than on one chance throw.

The moral argument: evolution explains the moral feeling, not the moral fact. Why we feel obligation and why some things are wrong are different questions. If the sense is only inherited instinct, cruelty is not wrong but merely distasteful to us, and almost nobody believes that, including those who say it.

Mind and body are matched, and the match is not free. Injury feels bad and is therefore fled; experience makes our reports of it true. The physics leaves that pairing open — the same wiring could have fastened pain to pleasure, or to nothing felt at all — and a creature disharmoniously built would survive just as well, since selection grades behavior, not feeling. The fit between the felt and the physical, as the psychophysical harmony argument presses, is better explained by a Mind than by matter alone.

The argument from hiddenness has an answer, and the argument from religious diversity proves less than it seems. A God who appeared unmistakably would compel assent rather than invite love, and room to refuse is a condition of love. That the traditions conflict shows most are wrong somewhere, not that all are wrong everywhere; physicians disagree, and medicine is not therefore false.

In short: taken one at a time, no argument is decisive. Taken together they point one way. A universe that did not have to exist, running on constants that did not have to permit us, yielding to mathematics it had no reason to obey, fitting its creatures’ minds helpfully to their matter, and holding creatures for whom cruelty is genuinely wrong, is better accounted for by a Creator than by blind matter. The objections trouble the believer without dissolving the reasons for belief.

See also the companion page What Do We Mean by “God”?