We should know mankind better if we were not so anxious to resemble one another.

Reason can never be popular. Passions and feelings may become popular, but reason will always remain the sole property of a few eminent individuals.

How often do I lull my seething blood to rest, for you have never seen anything so unsteady, so uncertain, as this heart.

The Christian religion, though scattered and abroad will in the end gather itself together at the foot of the cross.

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.

We must be young to do great things.

He who possesses science and art, Possesses religion as well; He who possesses neither of these, Had better have religion.