Some of the friends in the group of ten are in a state of ascent and others are going through hard times and descents and have an additional Aviut (coarseness). We are not responsible for these states, and so whether I like it or not, I simply have to take advantage of every state in order to advance. All the states come from Above and we mustn’t criticize them, and no matter whether we feel them as good or bad, we have to use them all as a means to advance.
Every group of ten is one cell, since it can generate only one unit of bestowal. One person in a group of ten or two or three people don’t count. Only if all the group of ten is connected correctly does it become one unit of bestowal, and then it begins to reveal its first Light of Nefesh.
From the 2nd part of the Daily Kabbalah Lesson 5/20/13, The Zohar, Introduction