To be constantly without desire is the way to have a vision of the mystery of heaven and earth. For constantly to have desire is the means by which their limitations are seen.
LaoziThose who know do not speak; Those who speak do not know. Stop up the openings, Close down the doors, Rub off the sharp edges. Unravel all confusion. Harmonize the light, Give up contention: This is called finding the unity of life.
Laozi