Question: Can we say that in our world there are two categories of souls: old experienced ones and new, young ones? Do the old souls come to our world specifically to help new souls?
Answer: Yes, this is really so.
Question: Do they somehow differ from each other?
Answer: It is impossible to tell the difference.
Question: That is, at first glance, I will not be able to understand whether it is a young soul or an old one?
Answer: No. In addition, there is the so-called reincarnation of souls. Every moment a person has a different soul.
From KabTV’s “Ask a Kabbalist” 12/31/18