“It is as impossible for man to demonstrate the existence of God as it would be for even Sherlock Holmes to demonstrate the existence of Arthur Conan Doyle.”

“"Elementary, my dear Watson, elementary," murmured Psmith. (Earlier usage of the precise words "Elementary, my dear Watson" has been found in the works of Sir Arthur Conan Doyle.)”

“To sustain the belief that there is no God, atheism has to demonstrate infinite knowledge, which is tantamount to saying, “I have infinite knowledge that there is no being in existence with infinite knowledge”

“The recognition of certain basic impossibilities has laid the foundations of some major principles of physics and chemistry; similarly, recognition of the impossibility of understanding living things in terms of physics and chemistry, far from setting limits to our understanding of life, will guide it in the right direction. And even if the demonstration of this impossibility should prove of no great advantage in the pursuit of discovery, such a demonstration would help to draw a truer image of life and man than that given us by the present basic concepts of biology.”

“Existentialism is nothing else but an attempt to draw the full conclusions from a consistently atheistic position. Its intention is not in the least that of plunging men into despair. And if by despair one means as the Christians do – any attitude of unbelief, the despair of the existentialists is something different. Existentialism is not atheist in the sense that it would exhaust itself in demonstrations of the non-existence of God. It declares, rather, that even if God existed that would make no difference from its point of view. Not that we believe God does exist, but we think that the real problem is not that of His existence; what man needs is to find himself again and to understand that nothing can save him from himself, not even a valid proof of the existence of God. In this sense existentialism is optimistic. It is a doctrine of action, and it is only by self-deception, by confining their own despair with ours that Christians can describe us as without hope.”

“Exobiology - a curious development in view of the fact that this "science" has yet to demonstrate that its subject matter exists!”

“Aron, you do not have faith in your wife, you do not know your wife, you cannot demonstrate it to me, she does not exist, period… How would you prove me your wife exists?”

“If in 100 years I am only known as the man who invented Sherlock Holmes then I will have considered my life a failure.”

“Show Holmes a drop of water and he would deduce the existence of the Atlantic. Show it to me and I would look for a tap. That was the difference between us.”

“It is not for the gods to decide whether or not Man exists - it is for Man to decide whether or not the gods exist.”