We have already explained that it is the repair of the Residue by the Line that brings the perfection which was seen even at the outset in the Supreme Will. However, this is the actual revelation of that perfection in all its details. It is then that the supreme perfection reaches the Line and the Residue, which are the light that creates the worlds, until the worlds created from them come to enjoy His eternal perfection, and this is eternity (נצחיות, nitzchiyut).
The way this perfection comes to the Line and the Residue is similar to the way the supreme light has to reach the soul, having been held back because of the body’s unrectified state. But afterwards the light does reach the soul when the body is repaired (after the resurrection). It is known that the main thing is the unity, i.e. the Line, which is like a soul shining with all its lights in the body, so that the perfect unity is revealed properly in all its aspects. And just as the body is secondary to the soul, and is purified and radiant, so the Residue is secondary to the Line, and it is already rectified, because evil no longer comes forth from it, but on the contrary, it stands to reveal the perfection of His unity by showing how the deficiencies were rectified through the power of that unity. (When the Residue is rectified, it too reveals the unity.) It is then evident that despite the great power of evil, it is one small matter that the Eyn Sof, blessed be He, wanted to display in order to demonstrate His perfection so that all existence may delight in Him through seeing the deficiencies that would exist were it not for the unity of His perfection and the repair accomplished by His perfect unity.