Rudolf Steiner: "Our Earth is a battlefield; it is the scene of two opposing powers: right and left. The one, the white power on the right, after the Earth has reached a certain degree of material, physical density, strives to spiritualize it once again. The other power, the left or black power, strives to make the Earth ever denser and denser, like the Moon. Thus after a period of time the Earth could become the physical expression for the good powers, or the physical expression for the evil. It becomes the physical expression for the good powers through man uniting himself with the spirits working for unification, in that he seeks the ego in the community. It belongs to the function of the Earth to differentiate itself physically to an ever greater degree. Now, it is possible for the separate parts to go their own way, for each part to form an ego. This is the black path. The white path is the one which strives for what is common, which forms an ego in community. Were we to burrow more and more deeply into ourselves, to sink ourselves into our own ego organization, to desire always more and more for ourselves, the final result would be that we should strive to separate ourselves from one another. If on the other hand we draw closer, so that a common spirit inspires us, so that a center is formed between us, in our midst, then we are drawn together, then we are united. To be a black magician means to develop more and more the spirit of separateness. There are black adepts who are on the way to acquire certain forces of the Earth for themselves. Were the circle of their pupils to become so strong that this should prove possible, then the Earth would be on the path leading to destruction."