Between the clear-cut solidity of the outer life in the sense-world and the impalpable delicacy of the inner life in the divine spirit, there is a region which many aspirants have to cross, but which a few succeed in avoiding. This is a region of illusion, fantasy, and psychism, where the ego uses its most cunning devices to entrap his emotions and entangle his passions, weaves its most specious flattery to seduce his intellect and imagination. On this part of his journey sensuality assumes the subtlest forms, fancy weaves the strangest occult experiences. Vanity receives the greatest encouragement through oracular or mission-bestowing messages, and unbalance is heightened to the pitch of neuroticism, hysteria, or even insanity. In this psychical stage of his development where error masquerades as truth, he will unconsciously impose upon the world of reality forms which properly belong to the world of sense. Here visions and messages, experiences and phenomena, things seen, heard, or touched by the imagination will constitute a subtle materialism designed to lead him astray. He must protect himself by drawing upon a strong, impartial self-criticism and self-denial, a strong, impersonal intelligence, and by seeking the counsel of a competent guide.
-- Notebooks Category 16: The Sensitives > Chapter 12 : The Intermediate Zone > # 37
