When the egoistic desire, which we discover inside us, begins to work with love and bestowal, it becomes what we call a soul to the degree that it exits itself and resembles the Creator. But if a person does not have such an altruistic desire, he does not have a soul either.
Question: But there is the concept of a corporeal soul?
Answer: This is merely a force of vitality that keeps our physical body alive. We have nothing but that. According to the wisdom of Kabbalah, a soul means our resemblance to the Creator.
From the Kabbalah Lesson in Russian 4/23/17