What with making their way and enjoying what they have won, heroes have no time to think. But the sons of heroes - ah, they have all the necessary leisure.

The Christian idea of a perfect heaven that is something other than a non-existence is a contradiction in terms.

In spite of language, in spite of intelligence and intuition and sympathy, one can never really communicate anything to anybody. The essential substance of every thought and feeling remains incommunicable, locked up in the impenetrable strong-room of the individual soul and body. Our life is a sentence of perpetual solitary confinement.

Man is an intelligence in servitude to his organs.

When people are suspicious with you, you start being suspicious with them.

The more powerful and original a mind, the more it will incline towards the religion of solitude.

Today we are faced, I think, with the approach of what may be called the ultimate revolution, the final revolution, where man can act directly on the mind-body of his fellows.