If I give a student one-fourth of what he should know, I expect him to get the other three-fourths himself, otherwise I do not want him as a student.

When young, beware of fighting; when strong, beware of sex; and when old, beware of possession.

There is one word which may serve as a rule of practice for all one's life -reciprocity.

Earnest in practicing the ordinary virtues, and careful in speaking about them, if, in his practice, he has anything defective, the superior man dares not but exert himself; and if, in his words, he has any excess, he dares not allow himself such license.

Before you embark on a journey of revenge, dig two graves.

Make fair agreements and stick to them

He who exercises government by means of his virtue may be compared to the north polar star, which keeps its place and all the stars turn towards it.