Working in the group on the unity of friends, even at the very initial stage, helps us to acquire a common aspiration to ascend above our egoistic desire. Through our common connection we receive the Upper Light, the Upper Force that influences us and elevates us.
We are talking about a system that works as a middleman: If we aim to become part of it, then the Upper Light works through the system and elevates us. After that, when we unite in a common system, it will be filled by the Upper Light.
From the 1st part of the Daily Kabbalah Lesson 10/31/10, “The Need for Love of Friends”