Answer: All the personal advancement is determined only by dissemination: How many souls I can attach to myself. There is no other advancement.
After all, we are connected in one system, so I can advance only by increasing the number of connections. If I am not connected to anyone, I am “0.” If I connected someone, I have become “1,” if I connected two, I have become “2.” And if I connect everyone, I will become infinity.
That is why, it is said: “They learn not through the mind.” The one who does not work to connect other souls to himself by love does not realize the method. He becomes just a plug on the path of the Light.
For this reason, Kabbalah was hidden for so many years. It was revealed only when we have reached a state when we can begin to connect. The breaking in Galgalta ve Eynaim in Israel occurred in order to connect the rest to itself. Correction is in unity, so there is no such question: Why we should connect?
From the 1st part of the Daily Kabbalah Lesson 9/5/12, Writings of Rabash