Know the male, but hold to the female. Imagine a river flowing through a valley, never departing from its original path. Do this and you will return to a state of innocence.
Perceive the bright, but hold to the dark. Like a river, let yourself flow with virtue, and set a faultless example for the world. Do this and you will return to a state of perfection.
Be aware of honor, but hold to humility. Like a valley, let virtue fill you, sufficient yet everlasting. Do this and you will return to the state of the uncarved block.
Just as when the uncarved block is shaped it loses its simplicity, when the wise person loses his simplicity he is no longer wise. Therefore it is best to stay on the original path.
(from Tao Te Ching, verse 28, translation by Robert Brookes)