It follows that the Emanator, blessed be His Name, brought into being a single existence: The greatness of the Supreme Wisdom lies in the fact that He did not create a multiplicity of different things with no common direction, but rather, a single existence. This single existence is so great in every respect that when we examine its particulars, we find all the different details that we see now. Accordingly we say that this entire existence takes the form of a single man – Adam – and that all these parts that exist now constitute the limbs of this Adam. Accordingly, this single existence is called the Order of the Likeness of Man. Anything we wish to understand with respect to any of the existent beings we see, we will understand in relation to this underlying Order of the Likeness of Man.
How Ein Sof Brought Forth a Unified Existence
Kalach Pitchei Chokhmah 12:13