2. On the Kabalistic Tree of Life, three is the number of Binah, the topmost sephirah on the left-hand pillar, the third in order from the top of the Tree. It represents the first Heh of Tetragrammaton, and thus is the universal mother.
In magickal groups, this is associated with the degree known as Magister Templi, master of the temple, implying that such a person has true mystical understanding of the mysteries.