...each one is called a world in itself... For in every case where a function is drawn down complete in all its necessary levels, those levels are collectively called a complete world, as stated earlier (Opening 31). And in truth, each one has a function of its own. These are the functions explained above and in the continuation:
Accordingly, when we look at Beriyah, Yetzirah and Asiyah with Atzilut, they can be considered only as the garments of Atzilut. This is as we said above: the functions themselves are executed only in Atzilut, and Beriyah, Yetzirah and Asiyah are subsidiary to them, for they are merely influenced by and drawn after Atzilut but they do not act independently, and in this aspect they are called garments. However, when they are considered according to their functions, they are called worlds in themselves… to the extent to which they act, this being the revelation of the function carried out in Atzilut.