The sages said: “A thousand people come to study, but only one comes out to the Light.” The studying of the one thousand creates the opportunity for one person to come out to the Light because everything grows in the form of a pyramid. There is no other way.
The entire still level gives rise to one plant, and the entire vegetative level to one animal. Hence, it’s impossible to bring one to the Light without one thousand who begin to study and enter the lower level.
It is the one thousand people who build the vessel so that their work will result in one force that reaches the Light. In other words, they achieve their general unity.
From the 1st part of the Daily Kabbalah Lesson 11/9/2011, Writings of Rabash