“Every argument for God and every attribute ascribed to Him rests on a false metaphysical premise. None can survive for a moment on a correct metaphysics....Existence exists, and only existence exists. Existence is a primary: it is uncreated, indestructible, eternal. So if you are to postulate something beyond existence—some supernatural realm—you must do it by openly denying reason, dispensing with definitions, proofs, arguments, and saying flatly, “To Hell with argument, I have faith.” That, of course, is a willful rejection of reason.Objectivism advocates reason as man’s sole means of knowledge, and therefore, for the reasons I have already given, it is atheist. It denies any supernatural dimension presented as a contradiction of nature, of existence. This applies not only to God, but also to every variant of the supernatural ever advocated or to be advocated. In other words, we accept reality, and that’s all.”

“The argument goes something like this: "I refuse to prove that I exist," says God, "for proof denies faith, and without faith I am nothing.”

“He who denies the existence of God, has some reason for wishing that God did not exist.”

“Reason excludes faith," Alessandro responded, watching the blood-red mite as it made a dash for the rim. "It's deliberately limited. It won't function with the materials of religion. You can come close to proving the existence of God by reason, but you can't do it absolutely. That's because you can't do anything absolutely by reason. That's because reason depends on postulates. Postulates defy proof and yet they are essential to reason. God is a postulate. I don't think God is interested in the verification of His existence, and, therefore, neither am I. Anyway, I have professional reasons to believe. Nature and art pivot faithfully around God. Even dogs know that.”

“Now it is such a bizarrely improbable coincidence that anything so mind-bogglingly useful could have evolved purely by chance that some thinkers have chosen to see it as the final and clinching proof of the non-existence of God.The argument goes something like this: "I refuse to prove that I exist,'" says God, "for proof denies faith, and without faith I am nothing.""But," says Man, "The Babel fish is a dead giveaway, isn't it? It could not have evolved by chance. It proves you exist, and so therefore, by your own arguments, you don't. QED.""Oh dear," says God, "I hadn't thought of that," and promptly vanishes in a puff of logic."Oh, that was easy," says Man, and for an encore goes on to prove that black is white and gets himself killed on the next zebra crossing.”

“One particularly poor argument in defence of eating meat is that if humans did not eat animals, those animals would not have been brought into existence in the first place. Humans would simply not have bred them in the numbers they do breed them. The claim is that although these animals are killed, this cost to them is outweighed by the benefit to them of having been brought into existence. This is an appalling argument for many reasons. First, the lives of many of these animals are so bad that even if one rejected my argument one would still have to think that they were harmed by being brought into existence. Secondly, those who advance this argument fail to see that it could apply as readily to human babies that are produced only to be eaten. Here we see quite clearly that being brought into existence only to be killed for food is no benefit. It is only because killing animals is thought to be acceptable that the argument is thought to have any force.”