Democritus said, words are but the shadows of actions.

And Archimedes, as he was washing, thought of a manner of computing the proportion of gold in King Hiero's crown by seeing the water flowing over the bathing-stool. He leaped up as one possessed or inspired, crying, "I have found it! Eureka!".

When a man's eyes are sore his friends do not let him finger them, however much he wishes to, nor do they themselves touch the inflammation: But a man sunk in grief suffers every chance comer to stir and augment his affliction like a running sore; and by reason of the fingering and consequent irritation it hardens into a serious and intractable evil.

For the mind does not require filling like a bottle, but rather, like wood, it only requires kindling to create in it an impulse to think independently and an ardent desire for the truth.

Wisdom is neither gold, nor silver, nor fame, nor wealth, nor health, nor strength, nor beauty.

When men are arrived at the goal, they should not turn back.

It is the usual consolation of the envious, if they cannot maintain their superiority, to represent those by whom they are surpassed as inferior to some one else.