Heaven and Earth last for ever. Why do Heaven and Earth last for ever? They are unborn, so ever living. The sage stays behind, thus he is ahead. He is detached, thus at one with all. Through selfless action, he attains fulfillment.
Words spoken about the Way have no taste. When looked at, there's not enough to see. When listened to, there's not enough to hear. When used, it is never exhausted.