Chapter VI - On the general nature of the I
VI - 1
The master said: 'Ch'ien and K'un may be regarded as the gate to the I'.
Ch'ien represents what is of the yang nature (bright and active); K'un what is of the yin nature (shaded and inactive). These two unite according to their qualities, and there comes the embodiment of the result by the strong and weak lines. In this way we have the phenomena of heaven and earth visibly exhibited, and can comprehend the operation of the spiritual intelligence.

VI - 2
The appellations and names of the trigrams and hexagrams are various, but do not go beyond. When we examine the nature and style of the appended explanations, they seem to express the ideas of a decaying age.

VI - 3
The I exhibits the past and and allows us to discriminate the issues of the future; it makes manifest what is minute, and brings light to what is obscure. Then king Wen opened its symbols, and distinguished things in accordance with its names, so that all his words were correct and his explanations decisive; the book was now complete.

VI - 4
The appellations and names of the trigrams and hexagrams are but small matters, but the classes of things comprehended under them are large. Their scope reaches far, and the explanations attached to them are elegant. The words are indirect, but to the point; the matters seem plainly set forth, but there is a secret principle in them. Their object is, in cases that are doubtful, to help de people in their conduct, and to make plain the recompenses of good and evil.