Pepper is small in quantity and great in virtue.

Wisdom is a blaze, kindled by a leaping spark.

Seven years of silent inquiry are needful for a man to learn the truth, but fourteen in order to learn how to make it known to his fellow-men.

The function of the wing is to take what is heavy and raise it up in the region above.

Mathematics is like draughts in being suitable for the young, not too difficult, amusing, and without peril to the state.

Worthy of honor is he who does no injustice, and more than twofold honor, if he not only does no injustice himself, but hinders others from doing any.

A sensible man will remember that the eyes may be confused in two ways - by a change from light to darkness or from darkness to light; and he will recognize that the same thing happens to the soul.