- Any system of philosophy or mysticism which proposes to
attain intercourse with God and superior spirits, and consequent
superhuman knowledge, by physical processes, as by the theurgic
operations of some ancient Platonists, or by the chemical processes of
the German fire philosophers; also, a direct, as distinguished from a
revealed, knowledge of God, supposed to be attained by extraordinary
illumination; especially, a direct insight into the processes of the
divine mind, and the interior relations of the divine nature.