In Igeres HaKodesh of Tanya chapter 15 we find a similar concept: When a parent has true pleasure and enjoyment in teaching his child, he will be able to find a way to explain it to him so that the child will understand. “Atik-Transcendant Power of Pleasure” in this case is the deep pleasure a parent when their child understands something important. It is this Atik-Deep Pleasure that powers the parent’s Bina-Understanding to be able to understand a concept in way they never thought about it before, on the level of child, so that they should be able to explain it to them. If they weren’t going to teach this to their own child, they wouldn’t come to that level of understanding, even if the parent is very wise and intellectual on the level of Chochma. Only because of the Atik-Pleasure they have in their child do they have the power of Bina-Understanding enough to bring down this concept to a child’s level.
So, too, here in Atzilus, for there to be an illumination of Bina – length and width of understanding Divinity, corresponding to the letter ה' which has dimensions of sideways and up and down, from the level of י' which corresponds to Chochma, which is referred to as “a conceptual point in a context of understanding,” like the letter י' which a dimensionless point, it must be through the revelation of an even higher level, which is the level of Atik, which is referred to as the “point on top of the י',” it is through this revelation of Atik that the י' expands into the ה'.
As is explained in Pardes, that the י' has three points: From the lower point, the ה' is drawn down, and in the lower point, there is also an illumination of the upper point. Therefore, there is an illumination of the upper point into Bina as well.
The letter י' as written in Ashuris has three “points” or extensions, one on the top left, one on the bottom left, and one on the bottom right. The point on the top left which extends directly upward, corresponds to Kesser-Crown, which includes Atik-Deep Pleasure. This point is then expressed in the third point which is at the bottom right of the letter. This third, bottom right, point is how the letter י' extents downwards. This corresponds to how Chochma -the body of the י'- extends downwards into Bina, the letter ה'. The letter ה' is expansive in the sense that it extends from right to left and from up to down, in addition to the third line in the bottom left corner. Due this expansiveness, it represents the expansiveness of Bina-Understanding.
