He loves not who does not see the faults of the beloved as virtues.

He who does not stretch himself according to the coverlet finds his feet uncovered.

How to please the public - that's the test, But nowadays I find I'm in a fix; I know they're not accustomed to the best, But they've all read so much they know the tricks. How can we give then something fresh and new That's serious, but entertaining too?

A useless life is an early death.

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.

At all times it has not been the age, but individuals alone, who have worked for knowledge. It was the age which put Socrates to death by poison, the age which burnt Huss. The ages have always remained alike.

It matters little whether a man be mathematically or philologically or artistically cultivated, so he be but cultivated.