heaven is eternal, earth everlasting. they endure this way because they do not live for themselves. in the same way, the wise person puts himself last, and thereby finds himself first, holds himself outside, and thereby remains at the center, abandons himself, and is thereby fulfilled.
I speak of that learning which wakes us acquainted with the boundless extent of nature, and the universe, and which even while we remain in this world, discovers to us both heaven, earth, and sea.
Without going outside, you may know the whole world, without looking through the window, you may see the ways of heaven. The farther you go, the less you know. Thus the sage knows without traveling; he sees without looking; he works without doing.