Said the Intellect - From the introduction that we have introduced has emerged a great root for us to contemplate, and this is the matter of deficiency and its completion. Because now we need to know what is the deficiency, and what are its consequences, and what is its rectification through which the creation will be completed, and through what path does this rectification occur, and its consequences:
What Is the Deal with Deficiency in the Universe
Da'at Tevunot 20:1