then it begets the mother of all, the all-comprising, all-bounding, the first-born, the never-swerving, the never-tiring holy ten, the keyholder of all" (cfr. the Kabbalistic Tree of Life ). The Pythagorean oath also mentioned the Tetractys, resembling the (Kabbalistic) Hebrew Tetragrammaton (YHWH): "By that pure, holy, four lettered name on high, nature's eternal