Makes no sense

Our soul is connected to our physical bodies by way of a silver cord. It's when our time on earth is finished that this cord is severed and our soul returns to world of spirit.

It's impossible for another soul to 'jump in' and take over a person's life. If this could happen then I suppose it could be said that God is running the universe in a chaotic way, which imo is highly unlikely to be the case.

If, for whatever reason, our wave of thoughts happen to be on the same wave length to theirs, we will pick up on their impressions and behave in a manner that befits them rather than ourselves.

That soul or spirit is you, an individual, non-physical, (no form) immortal, (can never die or be killed) spiritual being. You don't die and are never"born".
Only the physical, mortal, human body is born and eventually grows old and dies. We each, as spiritual beings, go through a succession of different lifetimes with a new baby body for each lifetime, new parents, new name. The problem being, we each forget our previous lifetime (how to tie your shoes) from one lifetime to the next. Being a young child in this now current lifetime, you are re-learning what you already know, but forgot. (how to tie your shoes, etc)