525. Three Lines – 3
“Right” is regarded as the essence of the Sefirot, similar to seeing, hearing, smell, and speech.
“Left” is Masach [screen] and Aviut [thickness], namely the will to receive and the Masach.
Afterward, when the middle line comes, it determines that the seeing, hearing, smell, and speech will not shine with light of Hochma, called GAR, but with Hassadim.
The middle line is called Daat. When it decides between Hochma and Bina, which are called “edges,” and each edge is called GAR, and each middle line is called VAK because it is what decides between them and what sustains the illumination of both of them, it is like a compromise between them.
For this reason, Hochma illuminates Hochma and has no need for Hassadim, and Bina illuminates Hassadim and has no need for Hochma, unlike Daat, which extends illumination of Hochma. It follows that on one hand, Hochma is extended, but it is only illumination of Hochma, which is in Zeir Anpin, and Bina receives Hochma only in Zeir Anpin. It turns out that this is called “deciding,” as though both are pleased with this compromise. Thus, Daat is only VAK.