" consists in the study of the Name of God in its manifestation. Jehovah in Hebrew is spelt by four letters, Yod, He, Vau and He--I. H. V. H. To these four letters is given the deepest symbolical meaning. The first letter expresses the active principle, the beginning or first cause, motion, energy, "I"; the second letter expresses the passive element, inertia, quietude, "not I;" the third, the balance of opposites, "form"; and the fourth, the result or latent energy. "

― P.D. Ouspensky , The Symbolism of the Tarot: Philosophy of Occultism in Pictures and Numbers