The Persians, Hindus, Babylonians, and Egyptians had their Trinities. In every instance these represented the threefold form of one Supreme Intelligence. In modern Masonry, the Deity is symbolized by an equilateral triangle, its three sides representing the primary manifestations of the Eternal One who is Himself represented as a tiny flame, called by the Hebrews Yod (י). Jakob Böhme, the Teutonic mystic, calls the Trinity The Three Witnesses, by means of which the Invisible is made known to the visible, tangible universe.
Manly P. Hall