The perfect man employs his mind as a mirror.

All men know the use of the useful, but nobody knows the use of the useless. Where can I find a man who has forgotten words so that I can have a word with him?

A battering ram can knock down a city wall, but it cannot stop a hole. Different things have different uses.

The men of old breathed clear down to their heels.

People live their lives, constantly surrounded by anxiety. if they live long before dying, they end up in senility, worn out by concerns: a terrible fate! The body is treated in a very harsh fashion. Courageous men are seen by everyone under Heaven as worthy, but this doesn't preserve them from death. I am not sure I know whether this is sensible or not.

The fish trap exists because of the fish. Once you've gotten the fish you can forget the trap. The rabbit snare exists because of the rabbit. Once you've gotten the rabbit, you can forget the snare. Words exist because of meaning. Once you've gotten the meaning, you can forget the words. Where can I find a man who has forgotten words so I can talk with him?

There are no greater adversaries than yin and yang, because nothing in Heaven or on Earth escapes them. But it is not yin and yang that do this, it is your heart that makes it so.