“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.”

“. . . 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.”

“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.”

“You can prove anything you want by coldly logical reason---if you pick the proper postulates.”

“People think of faith as being something that you don't really believe, a device in helping you believe simply it. Of course that is quite wrong. As Pascal says, faith is a gift of God. It is different from the proof of it. It is the kind of faith God himself places in the heart, of which the proof is often the instrument...He says of it, too, that it is the heart which is aware of God, and not reason. That is what faith is: God perceived by the heart, not be reason.”

“I can't prove to you that there is a God, I just know. All this suffering has to have a reason.”