If there is no God, then there is no reason for me not to do evil if it benefits me to do so. In secret, when hidden from the purview of the authorities, as long as you are sure that you cannot be caught, you might as well steal, make war, pillage, and commit whatever actions suit your fancy.
Take the money. Steal the inheritance. Commit fraud if it leads to a financial benefit. Go ahead and sleep with her. Extort if you must.
The only consequences that you need to fear are here, on earth, in this world; you only need to fear getting caught by the authorities.
If there is no God, I can follow my passions without compunction. In fact, I can experiment, sampling from any lust I wish, as long as I am sure I won’t be caught, there is no good reason not to do so. If there is no God, then nobody is watching me when other humans aren’t watching me. When I am alone, I am truly alone.
If there is no God, there is no good reason for me to be brave, to sacrifice my precious and valuable life for the health or freedom of a stranger. Those that have died before me are dead, and I cannot shame any of them.
If there is no God, then this is a godless universe. Then it is all for naught. Then I am actually just a hairy, sweaty, greasy bipedal ape, a bag of flesh, soon to disintegrate back into dust. We might as well do whatever we wish, because morals are just subjective, learned cultural things. To kill yourself today or die twenty years hence won’t matter at all, it being all the same an eternal dirt nap.
But if there is no God, then we still have miracles to contend with. We have the miraculous appearance of the universe, in all of its cosmic glory. We have the miracle of self-consciousness, and the resulting birth of a person’s soul out of nothing. We have the miracle of prayer, the fact that we can pray to a god that does not exist, is remarkable in itself. So, if there is no god, that would be awfully strange.
But if there is no God, it doesn’t matter– I will still be a Christian. I will still believe in prayer, in faith, in light, in goodness. I will stand for truth and expect persecutions to come. I will do good to my enemy, because a satisfied enemy may not be motivated to risk his life in battle in the present moment.
If there is no God, then we live in a dream. A contradiction. We are part of the great lie, the great falsehood, that something non-rational can rationally arise from the void. The contradiction becomes the central point for understanding everything, and at the same time understanding nothing.
If there is no God, then we live in a dream. Then we are just part of the great everything, the all-that-is. But if we are a small part of the great everything, the contradiction naturally arises and defeats our unbelief, because if everything exists, then God exists.
If there is no God, then there is no universe. We understand through intuition, reason and basic logical work that there cannot be a universe without a creator, that a godless universe is no universe at all.
And if there is no universe, then there is no God. Only God could see us, could hear our prayers through the illimitable number of possible worlds that could exist at any given time. And only a good God, who is perfect Love, could have allowed this universe to exist, with so many loveless creatures in it that so badly need redemption. God must be a God of redemption.
If there is no God, then Satan rules the world. Because if it is true that there is no God, it cannot at the same time be true that there is no Satan. One thing about the world that we know, is that Goodness may or may not exist, but evil certainly exists. And if evil exists, and Satan exists, then God must exist too.
If there is no God, then we are lost in our sins, then we really are despicable animals, wretched and irredeemable. All of us unsaved, not even making a mark on moral history. Unacceptable even to ourselves, and not even loved by our creator, whatever that might be. We are all doomed and hopeless orphans, lost in space.
If there is no God, then there is no spirit. If there is no spirit, then we are on our own. If we are on our own, we are just winging it. If we are just winging it, then there really is no cause to stress yourself about anything.
If there is no God, then there is no devil. Then we are the root and source of all evil in this world. We are the great Satan. We are the adversary to ourselves, to future generations, to the earth, to each other. If there is no devil, we have no excuse for our evil ways. We serve our sentence as demons, and then disintegrate into the void from which we never really left.
If there is no God, then there is no such thing as a chance happening. All of those lucky accidents, answered prayers, strokes of luck and unbelievable coincidences are stripped of their glamor. They are simply happenstance, the way of things, and due only to the interaction of matter with matter. But anyone who has been alive for any good number of years knows that, right there, is a bunch of baloney.