Educating the mind without educating the heart is no education at all.

Education begins at the level of the learner.

Every virtue is a mean between two extremes, each of which is a vice.

Men are divided between those who are as thrifty as if they would live forever, and those who are as extravagant as if they were going to die the next day.

The line has magnitude in one way, the plane in two ways, and the solid in three ways, and beyond these there is no other magnitude because the three are all.

The angry man wishes the object of his anger to suffer in return; hatred wishes its object not to exist.

The weak are always anxious for justice and equality. The strong pay no heed to either.