Intelligent people know others. Enlightened people know themselves.

Build up virtue, and you master all.

He who talks more is sooner exhausted.

To manage your mind, know that there is nothing, and then relinquish all attachment to nothingness.

Clay is fashioned into vessels; it is on their empty hollowness that their use depends. Doors and windows are cut out to make a dwelling, and on the empty space within, its use depends. Thus, while the existence of things may be good, it is the non-existence in them that makes them serviceable.

Thus an army without flexibility never wins a battle. A tree that is unbending is easily broken.

Prepare while it's easy.