And now one sees that there is a relation between sound and color. The first tendency a man has, is to open his eyes when he hears something, to see if he can see the color of it. That is not the way to see it. Color is a language. The very life which is audible, is visible also; but where? It is visible in the inner plane. The mistake is that man looks in the outer for it. When he hears music, he wants to see the color before him. Every activity of the outer world is a kind of reaction, in other words a shadow, of the activity which is behind it, which we do not see. And there is a difference in tone.