Knowledge, love, power-there is the complete life.

The laws of animality govern almost the whole of history.

I'm not interested in age. People who tell me their age are silly. You're as old as you feel.

Great men are the real men, in them nature has succeeded.

The philosopher aspires to explain away all mysteries, to dissolve them into light. Mystery, on the other hand, is demanded and pursued by the religious instinct; mystery constitutes the essence of worship.

Time is but the space between our memories; as soon as we cease to perceive this space, time has disappeared.

True poetry is truer than science, because it is synthetic, and seizes at once what the combination of all the sciences is able, at most, to attain as a final result.