Question: What’s the middle line? Is it a screen?
Answer: The middle line is the correct combination of the receiving desires (Kelim) and the forces of bestowal. I first prepare these desires and only then request from Above the power of the screen specifically for these desires. When I receive this force, I acquire a spiritual vessel (Kli) which is called the middle line where I’m able to perform the deed of bestowal.
Before the middle line emerges, I clarify what the left and the right lines are, what drawing the Light from Above downward means, and how I halt it completely through restriction. I have to discern what it means to push the Light away from below upward, and to what degree I can manifest my desire in order to create the Reflected Light that part of the Direct Light will clothe in, and not just simply push the incoming pleasure away as I did during restriction (Tzimtzum).
After all these clarifications are completed and I arrange myself to the best of my ability, I ask the force from Above to create an authentic desire, a spiritual vessel (Kli) from all that I have prepared. If I have prepared myself correctly, I receive the Upper force which does answer my request and unifies the desire to bestow and the desire to receive pleasure from both directions, left and right. It tests and sorts the Kli. I ask the Creator to participate in this for I don’t know how to work with it.
As soon as the Kli is ready, it gets “stamped” by the “seal” from Above which is a warranty that it won’t break once I begin using it. Further on, I continue to work in the middle line and receive in order to bestow, in faith above reason, while my forces of bestowal are working from below upward, and I’m certain that it will continue to be so.
To be in the middle line is a complete sequence of actions. There is a middle line in the states of Katnut (smallness), Ibur (conception), Yenika (nurturing), and Mochin (maturity). In each phase and without exception, in order to attain the middle line, I need assistance from Above in assessing, aligning, and merging with the Creator.
From the 2nd part of the Daily Kabbalah Lesson 7/15/10, The Zohar