As soon as you are in a social setting, you better take away the key to the lock of your heart and pocket it; those who leave thekey in the lock are fools.

Thinking is more interesting than knowing, but less interesting than looking.

We are pantheists when we study nature, polytheists when we write poetry, monotheists in our morality.

Whatever liberates our spirit, without also giving us mastery over ourselves, is destructive.

Faust: Who holds the devil, let him hold him well, He hardly will be caught a second time.

Do not give in too much to feelings. A overly sensitive heart is an unhappy possession on this shaky earth.

Truth is a torch but a tremendous one. That is why we hurry past it, shielding our eyes, indeed, in fear of getting burned.