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

Give a bowl of rice to a man and you will feed him for a day. Teach him how to grow his own rice and you will save his life.

Even in killing men, observe the rules of propriety.

Know what you know and know that you don't know what you don't know — that is the characteristic of one who knows.

Care not for want of place; care for thy readiness to fill one. Care not for being unknown, but seek to be worthy of note.

How should I know anything about another world when I know so little of this?

If a man keeps cherishing his old knowledge so as continually to be acquiring new, he may be a teacher of others.