A person reincarnates in our world and his spiritual gene is clothed in different bodies time after time. A person who lives this life but whose body dies before he fulfills his spiritual gene will return to a new corporeal body in which he will go through tens of years that were predetermined for him and then die again.
This will continue until he attains the development of the soul in one of his reincarnations.
But it is not that the knowledge one has acquired raises the level of the soul. Rather, it is the soul’s inherent nature that it will not grow by its own effort before it has acquired the knowledge of the spiritual nature. Its growth depends on the measure of its knowledge.
Generally speaking, knowledge doesn’t enable the soul to do anything. It enables a person to cooperate with the soul correctly in order to help it develop by the right actions.
The soul develops by the good and right actions to such a state that he will no longer have to return to a corporeal body in our world.
From KabTV’s “Fundamentals of Kabbalah” 6/16/19