The individual jiva-souls (marginal living entities) are eternal spiritual living PERSONS who can never be destroyed, terminated, divided into pieces or extinguished.
The individual jiva-souls are indestructible and were NEVER created, they have ALWAYS existed like Krsna has always existed.
We are all "old souls" because the jiva-souls have perpetually existed and were NEVER created.
The implications of existing for infinity is mind boggling because this means there really is no death for the jiva-