Optimism is the staunchest worshipper of life.

I am convinced that an electronic machine, no matter how smart and intelligent, being still a mere spatial structure in concept, can neither innovate nor even understand the self-evident proposition: 'No spatial structure can be a representation of any feeling'. Such innovation can only be a work of a non-spatial mind, like a human being, and only such innovation, it should be acknowledged, can pave the way for further scientific achievements.

The real doubt is the doubt that doubts that it doubts.

Ask a scientist a very profound question on his science, and he will be silent. Ask a religious person a very simple question on his religion, and he will be frenzied.

God shall be my last discovery.

The world is a contradiction; the universe a paradox.

The most fundamental law of tragedy is that the moments of greatest happiness are the hardest to attain.