Vacuity, tranquillity, mellowness, quietness, and taking no action characterize the things of the universe at peace and represent the ultimate of Tao and virtue. Therefore rulers and sages abide in them. Abiding leads to vacuity (embracing all). Vacuity leads to actuality. Actuality leads to the establishment of order among all things. Vacuity leads to tranquillity, tranquillity leads to activity, and activity leads to adjustment. Tranquillity leads to taking no action, and taking no action leads to everyone fulfilling his duty. Because one takes no action, one is at peace himself, and when one is at peace himself, no worry or sorrow can affect him and he enjoys long life.

(Tchuang Tzu)