There is a lower form of Spiritism, expressed through cheap paid mediums, as well as a higher form, expressed through non-professional persons who mix the mystical with the mediumistic. The student of philosophy must scrupulously avoid both these forms, must reject their so-called revelations and faithfully stay on the superior level which he is so fortunate to have attained.

-- Notebooks Category 16: The Sensitives > Chapter 13: The Occult > # 129