Chapter IV: Man and the Evolution of the World
Together with his message of the God of Light, Zarathustra taught also of those spiritual Beings who are revealed to the pure vision of the seer as the companions of the Light-Spirit, in contrast to the tempters who become manifest to the unpurified remnants of the clairvoyance preserved from Atlantean time. For it had to be made clear to the Persian people of that olden time, how in the soul of man, in so far as he directs his energy to doing work in the physical world, a battle is raging between the power of the God of Light and the power of His Opponent; and man had to be shown how he must bear himself, so that the Adversary may not lead him down to the abyss, but on the contrary his evil influence be turned to good by the forces of the God of Light.