There are three things against which the wise man guards: lust when young, quarrels when strong, and covetousness when old.
In speaking, it is best to be clear and say just enough to convey the meaning.
The superior man is firm in the right way and not merely firm.
Don't worry about being acknowledged by others; worry about failing to acknowledge them.
Shall I tell you what knowledge is? It is to know both what one knows and what one does not know.
If you shoot for the stars and hit the moon, it's OK. But you've got to shoot for something. A lot of people don't even shoot.