It was a great step in science when men became convinced that, in order to understand the nature of things, they must begin by asking, not whether a thing is good or bad, noxious or beneficial, but of what kind it is.

Don't judge a man's conscience by looking at his face cause he may have a bad heart.

Observe the light and consider its beauty. Blink your eye and look at it. That which you see was not there at first, and that which was there is there no more.

To be fond of learning is to be near to knowledge. To practice with vigor is to be near to magnanimity. To possess the feeling of shame is to be near to energy.

Fine words and an insinuating appearance are seldom associated with true virtue.

A superior man is modest in his speech but exceeds in his actions.