Abba and Imma must at times for Zeir Anpin’s sake divide up their lowest part – which is Israel Sabba and Tevunah – into a further subdivision. This is because of the need for gradation, so that Zeir Anpin should only receive the lights at a low strength, and all the other aspects of Zeir Anpin are governed accordingly. By the principle of gradation it is not proper that he should receive any more than this at that time. This division produces the Second Israel Sabba-Tevunah.
Following our discussion of the Mental Powers, we will now explain the way they are given to Zeir Anpin by Abba and Imma.