Esoteric Lesson
If the esotericist does not suppress this vanity, what happens then? He falls prey to the spirits of light, and not to the regular, good ones who are recruited from the ranks of the spirits of wisdom, but to those who work down into the realm of the spirits of movement. The good spirits of light have the task of guiding people in the evening as they fall asleep into the spiritual world, of guiding their entry into it so that they enter it unconsciously. If the esotericist wants to accelerate his development in an irregular manner and yet does not learn what he needs to know about the spiritual worlds, the other spirits of light take hold of him and influence his etheric body in such a way that the head region and the brain are affected in the physical body. Confusion, fanaticism, and finally the worst: insanity arise.
Cite:
GA 266b/1910-05-25/p010 · edition English