Question: What does the “union of hearts” between the friends in the group mean?
Answer: From the wisdom of Kabbalah, we know that the breaking occurred to enable the correction of Malchut. Unless Malchut incorporates the desires of bestowal (the Kelim of Bina), it’s impossible to correct it. Malchut is gradually being corrected through the mutual penetration of Malchut and Bina, with the exception being its basis, “the stony heart (Lev Ha Even),” which becomes corrected last.
We correct Malchut through incorporating the properties of bestowal, Bina, into the properties of reception, Malchut. In souls, this happens through their mutual penetration until all the souls completely intermix and become corrected through the others (Israel vs. the nations of the world within each person).
Our corrections can only occur by incorporating ourselves into one another. To correct oneself means to correct your mutual incorporation with all the other parts of the common soul. The basis of correction lies only in the correction of the broken connection between us. Everything results from this: the entire group charter and the laws that we need to aspire to fulfill by following the advice of the Kabbalists that are based on their understanding of the Upper World.
All of this comes from the correction of the Kelim which need to be included in one another. This is attained through the effort to connect by attracting the Light which corrects the mutual incorporation.
All the recommendations of the Kabbalists described in their books come from the laws that define the nature of the breaking, correction, and the perfect state. When they speak about it, they say, “Unite, hold gatherings of friends, raise your friends’ spirits.” However, we need to understand that this comes from the need to become incorporated in one another in order to jointly attract the Surrounding Light that will correct the connection between us.
From the 2nd part of the Daily Kabbalah Lesson 9/28/10, The Zohar