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.
LaoziThese possessions of a simpleton being the three I choose and cherish: to care, to be fair, to be humble.
LaoziWhoever relies on the Tao in governing men doesn't try to force issues or defeat enemies by force of arms. For every force there is a counterforce. Violence, even well intentioned, always rebounds upon oneself. The Master does his job and then stops. He understands that the universe is forever out of control, and that trying to dominate events goes against the current of the Tao. Because he believes in himself, he doesn't try to convince others. Because he is content with himself, he doesn't need others' approval. Because he accepts himself, the whole world accepts him.
LaoziI have three precious things which I hold fast and prize. The first is gentleness; the second frugality; the third is humility, which keeps me from putting myself before others. Be gentle and you can be bold; be frugal and you can be liberal; avoid putting yourself before others and you can become a leader among men.
Laozi