The Four Worlds of Emanation

The four worlds of Kabbalah, Atziluth (emanation), Beriah (creation), Yetzirah (formation) and Assiah (action), are the descending levels through which the divine light passes on its way into the material world. Atziluth is the world of pure divinity, Beriah of the archangels and the throne, Yetzirah of the angels and formation, and Assiah of action and the physical.

Each world is said to contain a complete Tree of Life, so that the ten sephiroth are repeated at every level, and the worlds are correlated with the letters of the divine name and with the parts of the soul.