Part 16 · Chapter 30

And it is found that ZA receives the essence of the light of Aba; only that the difference is this: the upper light, when it shines in the GAR of Atzilut, passes and shines through a great expansion. But the VAK of Atzilut, called ZA, receives the upper light literally, except that it is through a narrow window, which is the mouth of the Yesod of Ima. And in this there is no change of light at all from the upper to the lower. And this is the matter of "all of them You have made in wisdom," for all of Atzilut receives the light of the upper Emanator, only that up to Aba, called Hochma, it is in a great expansion, and from there and below it passes through a window.