Answer: Development of the soul happens within very narrow and precise frameworks, when the person is included in a group and he begins to develop the characteristic of bestowal together with the members of the group until reaching the characteristic of love and his involvement with that develops the soul. A soul cannot exist in one person, but only in a collection of people.
The most optimal situation is when ten people gather and through the correct use of the ego they begin to build above it and among them the supra-egoistic characteristic of connection that is the opposite of the ego.
When they use it this way, in an opposite direction, a very interesting phenomenon happens among them. To the extent of their effort and not through suppression of the ego but through using it correctly, they create above it a characteristic of love and connection.
They begin to feel that they lack the power that will help them to rise above the ego and use it correctly. They get this power from the depths of creation. In the unity among them they suddenly discover that in the center of the connection between them, a force like a whirlpool begins to be discovered among them. But it doesn’t draw inward, instead it emits outwardly and the Upper Light, the power of bestowal, reciprocal connection, love goodness and cooperation rise up from there.
When that force completes the correct connection between them and fills them, then the common state that they attain is called a soul.
From the Kabbalah Lesson in Russian 6/9/16