The nature of the creation is the doubling of one, and it is this doubling aspect which is the cause of all duality in life. This doubling aspect represents one positive part, the other part being negative; one expressive, the other responsive. Therefore, in this creation of duality, spirit and nature stand face to face. And as there is the first aspect, which I have called sound, and the next, which I have called light, at first in these opposite nature aspects, or responsive aspects, only the light works, and if the creation goes still deeper there is sound. In nature, which is face to face with spirit, what is first expressed is light - or what man first responds to is light, and what man responds to next is what touches him deeper: it is sound.