…one Line from Eyn Sof, blessed be He... For although the Residue has many parts, they are not separate but constitute a complete structure. Only in relation to us are they many, for we can only apprehend each thing by itself. However, the entire new creation brought into being by Eyn Sof, blessed be He, is a complete whole, and the All-Powerful looks down in all His power over this totality as one complete whole. Thus Eyn Sof in His intrinsic perfection executes a single act, and accordingly we say that it is a single Line.
The Single Line From Eyn Sof That Bridges the Gap
Kalach Pitchei Chokhmah 27:29