Pain is slight if opinion has added nothing to it; ... In thinking it slight, you will make it slight. Everything depends on opinion. It is according to opinion that we suffer. A man is as wretched as he has convinced himself that he is.

Man is a social animal.

Believe me if you consult philosophy she will persuade you not to lit so long at your counting desk.

They laboriously do nothing.

Nature does not reveal her mysteries once and for all.

He who is brave is free.