This is what I see, and what troubles me. I look on all sides, and everywhere I see nothing but obscurity. Nature offers me nothing that is not a matter of doubt and disquiet.

Thinking too little about things or thinking too much both make us obstinate and fanatical.

Those who are clever in imagination are far more pleased with themselves than prudent men could reasonably be.

There no doubt exist natural laws, but once this fine reason of ours was corrupted, it corrupted everything.

Appealing to his Einstein's way of expressing himself in theological terms, I said: If God had wanted to put everything into the universe from the beginning, H…

I believe that the unity of man as opposed to other living things derives from the fact that man is the conscious life of himself. Man is conscious of himself,…

We are, all of us, growing volcanoes that approach the hour of their eruption; but how near or distant that is, nobody knows - not even God.