The good man is the teacher of the bad, And the bad is the material from which the good may learn. He who does not value the teacher, Or greatly care for the material, Is greatly deluded although he may be learned. Such is the essential mystery.
LaoziThings flourish, then each returns to its root. Returning to the root is called stillness: Stillness is called return to life, return to life is called the constant; knowing the constant is called enlightenment.
Laozi