One should not go into churches if one wants to breathe pure air.

We believe that we know something about the things themselves when we speak of trees, colors, snow, and flowers; and yet we possess nothing but metaphors for things - metaphors which correspond in no way to the original entities.

All truths are bloody truths to me.

In a friend one should have ones best enemy. You should be closest to him with your heart when you resist him.

Conversation with a friend will only bear good fruit of knowledge when both think only of the matter under consideration and forget that they are friends.

Man wishes woman to be peaceable, but in fact she is essentially warlike, like the cat.

There is more wisdom in your body than in your deepest philosophy.