Occultism is concerned with the unseen working of nature, and with phenomena, forms, messages of the nonphysical side of the ego's being, including visions and voices experienced inwardly. It is on a lower level than pure Spirit, not dealing with the body and not dealing with spirit, but somewhere in between. It's easy to be led astray by it, since it is close to fantasy and imagination. Try to avoid seeking it, but if it comes by itself try to judge it critically and understand it. On the highest level there are no occult phenomena which keep you in your ego.
-- Notebooks Category 16: The Sensitives > Chapter 3: Philosophy, Mysticism, and The Occult > # 86