Now in the case of Atzilut, Beriyah, Yetzirah and Asiyah, each provides a separate division of creations. Beriyah provides the souls and Yetzirah provides the angels, while Asiyah provides the material entities. If so, the separate creations (נפרדים, nifradim) are one system resulting from many causes, these being all the various worlds. They are not one thing that descends level by level from root to root.
And you would not be correct in saying that this too is a hierarchical scale made up of the souls on one level, the angels on another and the material creation on yet another. For the Kabbalistic sages taught: “Imma nests in the world of the Throne (=Beriyah), Zeir Anpin nests in the Six Directions (=Yetzirah), while the Shechinah nests in the Wheel (=Asiyah)” (Tikkuney Zohar #6, 23a; see Etz Chayim Pt. II, Shaar Seder ABY”A). Imma, Zeir and Nukva are not a hierarchy of levels one below the other, each a mirror of the other. Rather, each is something in itself, even though they do emerge in a developmental sequence. So too, Beriyah, Yetzirah and Asiyah are each something separate in itself, because each one has its own function. And these functions are those I have ennumerated: the bringing forth of souls, angels and the material world, which correspond respectively to Imma, Zeir and Nukva.