Nothing is true, but that which is simple.

Because everyone uses language to talk, everyone thinks he can talk about language.

Two souls dwell, alas! in my breast.

Beware of dissipating your powers; strive constantly to concentrate them.

Mathematics can remove no prejudices and soften no obduracy. It has no influence in sweetening the bitter strife of parties, and in the moral world generally its action is perfectly null.

A leaf that is destined to grow large is full of grooves and wrinkles at the start. Now if one has no patience and wants it smooth offhand like a willow leaf, there is trouble ahead.

The absence of temptation is the absence of virtue.