In sum, we have two things: (a) The results of Eyn Sof’s action; (b) His execution of that action. It is the results that reach us, and these are within limits. However, the way in which He executes the action is concealed from us, and this is without limits. The limited result of His work is the Residue. But the work has to be executed, and His execution of it is without limits, for it is performed by Eyn Sof, blessed be He, Who acts without limits. Thus we see that what is rooted in the Residue exists only through the Unlimited, but if the execution of the action had also been within limits, the Residue would have functioned by itself without need of the Unlimited.
The Artist and the Painting as Metaphor for Eyn Sof
Kalach Pitchei Chokhmah 27:14