We evaluate the services that anyone renders to us according to the value he puts on them, not according to the value they have for us.

One must repay good and ill; but why just to the person who did us good or ill?

Women and egoistic artists entertain a feeling towards science that is something composed of envy and sentimentality.

Error has made man so deep, sensitive, and inventive that he has put forth such blossoms as religions and arts. Pure knowledge could not have been capable of it.

No artist tolerates reality.

There is no more dangerous error than that of mistaking the consequence for the cause.

I love him who is ashamed when the dice fall in his favour, and who then asketh: "Am I a dishonest player?" - for he is willing to succumb.