Question: Baal HaSulam writes that people need to undergo upbringing to develop the desire for spirituality. He goes on to explain that a person who considers the life of society more important than his own life is called a spiritual person.
But how can an egoist be brought up so that he will suddenly start treating others this way?
Answer: The fact is that we are all being brought up in the field of the upper Light. Therefore, if people gather together, then by influencing one another, they create a field that sustains them.
Similar to how a magnet holds a piece of metal above a surface, this field created by society can hold an egoistic individual from falling back into his egoism so he exists above it. This is the mutual guarantee.
From the Kabbalah Lesson in Russian 12/24/17