Question: Кabbalists prohibit engaging the left line in communication with the friends. What is this left line?
Answer: The left line is my egoistic desire aimed solely at receiving or getting fulfilled. It stimulates me “incorrectly,” yet assists me thereby. If I know how to work with it, I discover “help against me” in the left line.
The left line is always turning, twisting, and pushing me; if I keep examining it, if I am sensitive to its setups and treat its every new “project” with suspicion, then such self-examining helps me to keep adhering to the Light. As a result, thanks to the forces of reception and bestowal, I always rise above the desire, above the provoking thoughts and actions, in order to look at them from the side.
For as long as a person is submerged in his will to receive, he remains at the animate level and is subordinate to nature. However, we speak of the steps being made above nature or above reason.
From the 1st part of the Daily Kabbalah Lesson 10/5/10, “What to Look for in the Assembly of Friends”