The Zohar, Chapter "VeYechi (Jacob Lived),” Item 119: “Only your fathers did the Lord desire.” “Your fathers,” actually three—Abraham, Isaac, and Jacob. It writes, “Only,” really only, that there are no more than these three, and from them all the others branch out and grip, meaning all the degrees in BYA. They rise for MAN to ZON, to crown the Name, to extend new Mochin to the Nukva, who is called “Name.”
The Zohar always brings us to the middle line in all the states. That is its mission: to constantly show us how we can arrange the two lines we receive from Above, from the Creator – the force of bestowal and the force of reception. The Zohar shows us how to build our reality out of them so we are above the force of bestowal and the force of reception. We ascend above both of them and receive them to the degree we are able to include one inside the other. Their mutual combination builds the middle line in us.
The middle line is built out of the sum of two lines, by using the best from both of them. The middle line is formed when the left line becomes included in the right line, and the right line in the left line, and then you take what is shared between them – their mutual combination from both sides (Malchut in Bina and Bina in Malchut). That is how you make the middle line.
This is the fundamental principle, and the same thing happens to the soul. The soul does not exist unless we build it. Even though it is called "a piece of the Creator from Above," in fact this piece does not come from the Creator unless I build it through the connection between us. This spiritual vessel (Kli) does not exist. We build it in the form of a connecting net between us.
The same thing happens with the middle line because it is the soul. The right and left lines, bestowal and reception, come to us. They are both forces of nature. When I combine them in the right way, then the middle line or the soul is formed out of them.
In our relationships we deal with the forces of bestowal and reception. Based on our reception we build the form of bestowal, and that is how we attain the soul by creating a middle line between us. There is no reality besides the one we build between us. Everything becomes revealed there, in that reality.
The Zohar brings the middle line to us from Above. While reading it, we have to try to become included into that line. Then we are tuned to the same wave through which the Light comes to us and returns us to the Source, the Creator.
From the 2nd part of the Daily Kabbalah Lesson 8/30/10, The Zohar