It is the same with color. No color is inharmonious, however striking or however pale. If it is in its right place, if it is well blended with other colors, it is harmonious; it is inharmonious if it is not put next to colors that blend with it. And it is exactly the same with human nature. The wise person can get on with another who is near to him in wisdom, or he can get on with a foolish person; but a wise man has difficulty in getting on with the semi-wise, because the semi-wise makes it difficult for him. With a strong person another who has strength himself will get on all right, as well as the one who is quite feeble, but not the halfstrong. This proves to us that there are two principles to be understood. The person must either be of the opposite quality, or he must be of the same quality to blend harmoniously with the other. In other words, with a black coat either a black tie will be worn or a white tie; when the tie is of another color then there is disharmony.