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.

If you want a wise answer, ask a reasonable question.

Nature goes her own way, and all that to us seems an exception is really according to order.

If I work incessantly to the last, nature owes me another form of existence when the present one collapses.

If you miss the first buttonhole, you will not succeed in buttoning up your coat.

To have more, you must first be more.

Aptitudes are assumed, they should become accomplishments. That is the purpose of all education.