On the relationship between the soul and the ego

According to Rabbi A.'s understanding, when does the soul enter the body? on. Is it necessary that every soul is different or that everyone has the same soul (which is decisive in such an education and such an environment, of course, not always, but statistically, and for the time being, is it possible that part of someone's personality comes from their soul?) C. And that they believe in the survival of the soul – who remains? After all, without the education, the environment in which I grew up, I don't think I would identify with what will remain? (D. The same can also be asked about the theory of reincarnations, in what sense is my reincarnation me, but according to the Rabbi's view, I don't think there is any place at all for reincarnations, which are built on the assumption that each person has a specific goal and all of our projections are directed by God, something the Rabbi does not believe in.)