“The triad, being the fundamental principle of the whole Kabalah or Sacred Tradition of our fathers, was necessarily the fundamental dogma of Christianity; the apparent dualism of which it explains by the intervention of a harmonious and all-powerful unity. 

Christ did not put His (Cabalistic) teaching into writing, and only revealed it in secret to His favored disciple, the one Kabalist (John) ,and he a great Kabalist, among the apostles.”

Lévi, Eliphas: Transcendental Magic