One's personal mystic experience is an important, perhaps the most important, test of the truth; but it should not stand alone. It needs to be checked by other standards. And it should be kept in the direction of the true and highest goal--discovery of the Soul. It should be kept away from the direction of occult phenomena. Psychic experience is something heard or felt or seen or touched--it is a sense-contact and belongs to the body's realm. The senses may deceive a man--or be used to deceive him! For such experiences involve the same five senses, albeit in another dimension, and need even more checking than physical ones. They belong to a road that is beset with temptations illusions and deceptions but in any case it is not "the straight and narrow path" to the kingdom of heaven. Psychism easily leads to a feeding and fattening of the ego, whose vanity glories in "powers" which it can show off to impress other people or even use to exploit them for its own benefit.
-- Notebooks Category 16: The Sensitives > Chapter 12: The Intermediate Zone > # 38