It has been explained that there is no novelty that can come into being in the world that will not be drawn from the general root in Ein Sof, blessed be He, and from its particular root in Atzilut, after which it passes via Beria, Yetzira, and Asiya, and attains the status of a created being, and then it comes into being in this world. Understand this thoroughly.
With the above you will comprehend that all of these changes which are depicted in the world of Atzilut are not stated with regard to the Divinity Himself, but only with respect to the souls, in the measure that they receive from Atzilut, via the three worlds of Beria, Yetzira, and Asiya. The reality of that world is the relationship of the planned design to the initial thought, which is Ein Sof, blessed be He. However, in both cases, both in Ein Sof, blessed be He, as well as in the world of Atzilut, nothing of the souls as yet exists there. This is similar to the planned design of a person who thinks it, where nothing of the actual word, be it bricks, or metal exist in his brain.