Quotes:Worlds, the Four
H. P. Blavatsky
The Four Worlds. The Kabbalists recognise Four Worlds of Existence: viz., Atziluth or archetypal ; Briah or creative, the first reflection of the highest; Yetzirah or formative; and Assiah, the ‘World of Shells or Klippoth, and the material universe. The essence of Deity concentrating into the Sephiroth is first manifested in the Atziluthic World, and their reflections are produced in succession in each of the four planes, with gradually lessening radiance and purity, until the material universe is arrived at. Some authors call these four planes the intellectual, Moral, Sensuous, and Material Worlds. [w.w.w.]
Source: H. P. Blavatsky, The Theosophical Glossary, art. Worlds, the Four