All nations of antiquity considered the triangle sacred and symbol of Deity. - Ancient Mysteries and Modern Masonry- Rev. Charles Vail
The 3 sides = 3 aspects of GOD, Will Wisdom and Intelligence = TRINITY in Unity
The double triangle interlaced, symbolizes the manifested universe-
union of spirit and matter
Triangle pointing upwards - spirit or fire
Triangle pointing downwards - matter or water
Double triangle is used in India and symbolizes 2 Hindu Gods - Siva and Vishnu