Time flies, and what is past is done.

Poor fool! in whose petty estimation all things are little.

Whoever wishes to keep a secret must hide the fact that he possesses one.

I have learned much from disease which life could have never taught me anywhere else.

That is the way of youth and life in general: that we do not understand the strategy until after the campaign is over.

Die Mathematiker sind eine Art Franzosen. Spricht man zu ihnen, so übersetzen sie alles in ihre eigene Sprache, und so wird es alsobald etwas ganz anderes. Mathematicians are a kind of Frenchmen. Whenever you say anything or talk to them, they translate it into their own language, and right away it is something completely different.

You don't love if you don't take the beloved's faults for virtues.