Question: Why don’t people live for a greater number of years or indefinitely? Why change bodies?
Answer: If we lived even a thousand years, we would still be in a hurry to do something because life would be finite. Conversely, if we lived indefinitely, we would not feel that we were subject to any forces, to the limits of time.
Suppose we existed as an organism that just lives, without beginning and without end. We cannot even imagine such a state because everything is measured: existence – absence, existence – absence; that is, every second something is born and something dies. Death is fortunate, because death pushes us to understand life.
Question: What remains of a person who lived a certain number of years?
Answer: The sensory information is in the heart and mind. The measure in which a person advanced with respect to others, the extent to which one has brought about a rapprochement between oneself and others in order to bring everyone closer to the Creator. This is what remains of a person.
Only this remains qualitatively because connection is the purpose of creation.
The purpose of creation is to connect humanity into a single whole. Not in one piece of flesh, but in one single desire, which consists of many different desires, but all are directed so that they help to connect with each other.
Question: That is, they are all connected into one desire to reveal the Creator?
Question: So, if a person does this during his life, then his or her efforts, experiences, and feelings remain and move on?
Answer: All this remains.
Question: Even if one already is doing that but has not reached the goal, why does that person have to die and be born again in a different body?
Answer: It does not depend on the person, but rather on the general condition of humanity.
From KabTV’s “Fundamentals of Kabbalah,” 1/14/19