1. The Book of Changes is vast and great. When one speaks of what is far, it knows no limits. When one speaks of what is near, it is still and right. When one speaks of the space between heaven and earth, it embraces everything.
Here the Book of Changes is brought into relation with the macrocosm and the microcosm. First the horizontal extent of its domain, its vastness, is given; its laws are valid to the utmost distance and likewise for what is nearest, as one's own inner laws. Then the vertical extent is given, the space between heaven and earth, because the fates of men come down to them from heaven.
2. In a state of rest the Creative is one, and in a state of motion it is straight; therefore it creates that which is great. The Receptive is closed in a state of rest, and in a state of motion it opens; therefore it creates that which is vast.
"The Creative" means here the trigram in the Book of Changes, and more especially the line, by which it is symbolized. When at rest, this is a simple unbroken line (⚊); when it is in motion, its direction is straight straight forward. The Receptive is symbolized by a divided line (⚋); it is closed when at rest and opens when in motion. Thus that which is wrought by the Creative is designated, in accordance with its nature, as great. The Creative produces quality. That which is produced by the Receptive is designated, in accordance with its form, as broad and manifold. The Receptive produces quantity.
3. Because of its vastness and greatness, it corresponds with heaven and earth. Because of its changes and its continuity, it corresponds with the four seasons. Because of the meaning of the light and the dark, it corresponds with sun and moon. Because of the good in the easy and the simple, it corresponds with the supreme power.
Here the parallels between the Book of Changes and the cosmos are shown. The Book of Changes contains material multiplicity, quantity, like the earth. It contains dynamic greatness, quality, like heaven. It shows changes and closed systems like the course of the year within the four seasons. In the light principle it reveals the same meaning as that underlying the sun. The light principle is called yang. The term for the sun is t'ai yang, the Great Light. In the dark principle, it reveals the same meaning as that underlying the moon. The dark principle is called yin. The term for the moon is t'ai yin, the Great Dark.
It has been explained above that the essence of the Creative lies in the easy, the essence of the Receptive in the simple, in those seeds from which everything else develops spontaneously. This mode corresponds with the good in tao, its art of continuing life in the simplest manner (cf. chap. V, sec 2), and thus it corresponds with the supreme power of tao (cf. chap. V, sec 4).