Tertium Organum: The Third Canon of Thought - Paperback

by P. D. Ouspensky (Author)

"I have called this system of higher logic Tertium Organum because for us it is the third canon-third instrument-of thought after those of Aristotle and Bacon. The first was Organon, the second, Novum Organum. But the third existed earlier than the first." TERTIUM ORGANUM