Is there anything that unites these two things? Yes, there is. And what is it? It is harmony. It is not a particular color which is harmonious, or which lacks harmony. It is the blending of that color; it is in what frame it is fixed; how the color is arranged. In accordance with that it has its effect upon the one who sees. So it is with sound. There is not any sound which is harmonious or inharmonious in itself; it is the relation of one sound with another sound that creates harmony. Therefore harmony is not a thing that one can point out; one cannot say: "This or that certain thing is harmony." Harmony is a fact. Harmony is the result of the relation between color and color, the relation between sound and sound, and the relation between color and sound.