The man of understanding finds everything laughable.

A man doesn't learn to understand anything unless he loves it.

Rest not. Life is sweeping by; go and dare before you die. Something mighty and sublime, leave behind to conquer time.

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.

Treat people the way they are and they will stay that way. Treat people the way they can become and they will become that way.

Many people take no care of their money till they come nearly to the end of it, and others do just the same with their time.

The phrases that men hear or repeat continually, end by becoming convictions and ossify the organs of intelligence.