If I don’t have support from my friends in the group, then I cannot advance spiritually. At the very least I must have passive support from the group to the extent every person is able to provide it.
That’s why the great Kabbalist Rabbi Yossi Ben Kisma was able to be in a small group of students who, like babies, aspired to him, and this was sufficient for him to advance. If he aspired according to his level, and they aspired according to their level, this was enough for him to attract the Light of Infinity through them.
The Light is at absolute rest. It is the same everywhere and everything depends on the person using it. Therefore, there is no difference between a small group of beginners and a large group of advanced students. Everything depends on a person and how much he really aspires to the mutual guarantee. To the degree he puts efforts into the group, he receives what he needs from the Upper Light. Therefore, he advances and helps others to advance as well.
From the Lesson on 9/17/10, "Mutual Guarantee"