Merkaba or Merkavah, is an ancient Jewish mysticism school. Through the years 100 BCE and 1000 CE. It is taught as a esoteric vision in books that of Ezekiel or the Heikhalot literary, concerning subjects ascents and the heavenly throne of God.
For the further explanation and story. Consciousness and sacred geometry https://www.crystalinks.com/merkabah.html
Merkabah, also spelled Merkaba, is the divine light vehicle allegedly used by ascended masters to connect with and reach those in tune with the higher realms. "Mer" means Light. "Ka" means Spirit. "Ba" means Body. Mer-Ka-Ba means the spirit/body surrounded by counter-rotating fields of light, (wheels within wheels), spirals of energy as in DNA, which transports spirit/body from one dimension to another.
The word Merkaba or Merkava - Hebrew 'Chariot' or 'to ride an animal, in a chariot' - is used in the Bible (Ezekiel 1:4-26) to refer to the throne-chariot of God, the four-wheeled vehicle driven by four Cherubim, each of which has four wings and four faces (of a man, lion, ox, and eagle). Merkabah/Merkavah Mysticism (or Chariot mysticism) is a school of early Jewish mysticism, c. 100 BCE-1000 BCE, centered on visions such as those found in the Book of Ezekiel chapter 1, or in the hekhalot ("palaces") literature, concerning stories of ascents to the heavenly palaces and the Throne of God. The main corpus of the Merkabah literature was composed in Israel in the period 200-700 CE, although later references to the Chariot tradition can also be found in the literature of the Chassidei Ashkenaz in the Middle Ages. A major text in this tradition is the Maaseh Merkabah (Works of the Chariot). In Ancient Alien Theory the Chariot is a UFO.
Further study:
Sacred Geometry https://www.crystalinks.com/sg.html
Consciousness https://www.crystalinks.com/consciousness.html
Wheels within wheels, the wheel of karma and alchemy https://www.crystalinks.com/wheelofkarma.html