Answer: To unite means to identify with the friends who have the same goal as I do, the desire to discover the meaning of life.
I organize a group with the friends and we unite because without them I cannot ascend above my ego and begin to feel the upper world.
We understand that we cannot manage without each other because we have to establish a system of mutual actions between us that will have the attributes of the upper world. Then like in a magic mirror, we will see a new world, and it will gradually be revealed in the connection between us.
This is the reason that I am looking for people who share the same views as mine; together we establish a connection that is similar to spiritual connection, and in this connection, we gradually feel the upper world, which means our complete interaction up to the revelation of the Creator in it.
From the Kabbalah Lesson in Russian 10/30/16