IX. Pictorial Representations as a Necessary Educational Tool for Mental Training

But what is important is the ratio of 1:3:7:12. If you understand the relationship between these numbers as a tone ratio, in that you imagine that a tone makes three vibrations in a certain time, another seven vibrations in the same time, and yet another twelve vibrations, then you have expressed in these numbers the ratio that indicates the ratio of the I, the astral body, the etheric body and the physical body in spiritual music.