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Chapter X - The lines (continued)X - 1
The I is a book of wide comprehension and great scope, embracing everything. There are in it the Tao of heaven, the Tao of man, and the Tao of earth. It then takes the lines representing those three Powers, and doubles them. What these six lines show is simply this: the way of the three Powers.
X - 2
This way is marked by changes and movements, and hence we have the imitative lines. Those lines are of different grades in the trigrams, and hence we designate them from their component elements. These, when mixed together, give rise to elegant forms. When such forms are not in their appropriate places, good fortune and bad are thus produced.