"It is easy to forget how full the world is of people, full to bursting, and each of them imaginable and consistently misimagined."

Life has to be given a meaning because of the obvious fact that it has none.

A law of nature， lex naturalis， is a precept or general rule found out by reason， by which a man is forbidden to do that which is destructive of his life or takes away the means of preserving the same.

The true meaning of life is to plant trees, under whose shade you do not expect to sit.

The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.

伟大的历史是用墨水和鲜血写成的。