One of the most ancient and universally known symbols, visible in the traditions of the Aztecs, Babylonians, Buddhists, Hindus, and many more.
"The four points of the cross symbolize the Fire, the Air, the Water, and the Earth (also Spirit, Matter, Movement, and Repose)... The cross has four points. The cross of initiation is phallic. The insertion of the vertical phallus into the formal cteis forms a cross. This is the cross of initiation that we must place upon our shoulders." - Esoteric Course of Alchemical Kabbalah
"The cross does not alone represent a cross upon which a man was hung, but also a thing upon which glory descended. The cross is the symbol of one crucified and reborn into the Innermost, and not a thing of torture and pain. Crucifixion means one who has mastered his lower nature, and has been made clean in the consciousness of the Innermost." - M, The Dayspring of Youth