Perhaps for the benefit of the understanding of our practitioners, would it be best to add, after the revision stated above, the phrase, “undertaken by portions of the soul?”

Any way you choose to clarify the possibility of a new launching of a soul portion as an incarnation that overlaps one ongoing among any of the time domains would be a benefit. It is already quite complicated, so anything that can be done to make clear the variety of possibilities would be a benefit for the learning of new practitioners.