Wow, everyone seems to need to believe this guy is a crackpot. But why? Jesus said we have souls, this guy is validating that. Where’s the problem? Reincarnation? The miracle is that God incarnated us the first time - additional times would be easy once He got some practice in. It’s all one long lifetime for the soul, though, because you’re either with God or you’re not. Of course, eternal hell gets replaced by an almost eternal hell. But that makes more sense for a God of Love to most people. And as for those who do a head count and say that there are too many people and animals now to make up the few in the past, I say read “Forbidden Archeology” - and contemplate the number of stars in the sky.
Someone who sets about to "prove" the obvious can still be a crackpot.
Jesus had no need to convince those he taught that souls existed, because they were not specially trained to be ignorant of such an obvious fact. Validation of the existence of your own soul is trivial while validation of the existence of your body is based on faith in what your senses tell you. In theory your body could be all part of some illusion or trick. Almost anything could be an illusion...the only thing we can be absolutely sure of is that we are something that can observe and experience. We are a soul. It is proven intrinsically and with much more certainty than anything else can ever be.