“I do not pretend to be able to prove that there is no God. I equally cannot prove that Satan is a fiction. The Christian god may exist; so may the gods of Olympus, or of ancient Egypt, or of Babylon. But no one of these hypotheses is more probable than any other: they lie outside the region of even probable knowledge, and therefore there is no reason to consider any of them.”

“If there are no self-evident first principles, as a foundation for reasoning to conclusions that are not immediately apparent, how can you construct any kind of a philosophy? If you have to prove even the basic axioms of your metaphysics, you will never have a metaphysics, because you will never have any strict proof of anything, for your first proof will involve you in an infinite regress, proving that you are proving what you are proving and so on, into the exterior darkness where there is wailing and gnashing of teeth. If Descartes thought it was necessary to prove his own existence by the fact that he was thinking, and that his though therefore existed in some subject, how did he prove that he was thinking in the first place? But as to the second step, that God must exist because Descartes had a clear idea of him – that never convinced me, then or at any other time, or now either. There are much better proofs for the existence of God than that one.”

“As a philosopher, if I were speaking to a purely philosophic audience I should say that I ought to describe myself as an Agnostic, because I do not think that there is a conclusive argument by which one can prove that there is not a God. On the other hand, if I am to convey the right impression to the ordinary man in the street I think that I ought to say that I am an Atheist, because, when I say that I cannot prove that there is not a God, I ought to add equally that I cannot prove that there are not the Homeric gods.”

“If the painful history of the human and Christian striving for God proves anything, it surely proves this: that any attempt to reduce God to the scope of our own comprehension leads to the absurd. We can only speak rightly about him if we renounce the attempt to comprehend and let him be the uncomprehended. Any doctrine of the Trinity, therefore, cannot aim at being a perfect comprehension of God. It is a frontier notice, a discouraging gesture pointing over to unchartable territory. It is not a definition that confines a thing to the pigeonholes of human knowledge, nor is it a concept that would put the thing within the grasp of the human mind.”

“True happiness is not found in any other reward than that of being united with God. If I seek some other reward besides God Himself, I may get my reward but I cannot be happy.”

“The happiest pillow on which you may rest your head is the knowledge of God's will. I cannot imagine a more miserable situation than consciously to be out of God's will.”