The Merkaba (mer-ka-ba = light-spirit-body) consists of upward and downward tetrahedrons, spinning in opposite directions to create a 3 dimensional energy field (Toroid) in which everything exists.
It represents the duality of existence- body and spirit- in a singular form of rest and equilibrium, where all is one. The symbol, which takes the shape of a star, is believed to be a divine vehicle made entirely of light and designed to transport or connect the spirit and body to higher realms of consciousness.
The Merkaba appears in every major spiritual system. In the bible, the word Merkaba appears in the Old Testament 44 times. The Angel Ezekiel accessed the Merkaba star of David to ascend to heaven. In the Torah, it is the chariot, the throne of God. The Zohar, the foundation of the Kabbalah, realises that in awareness and selfless action you bring yourself closer to the Merkaba. Zen Buddhism is a path to the same higher consciousness the Merkaba represents. Merkabah meditation, first practiced in ancient Egypt, consists of 18 spherical breaths to open the heart to the realm of oneness.