Is the re-birth recurrence principle a belief or an assumption proved true by those more spiritually evolved in states of higher consciousness? Were there instances of verification or revelations in ancient or in recent times?
EDIT1:
Punarapi jananam, punarapi maranam... is Adi Shankara's assertion. Attainment of Mokasha is getting out of this round and round unending continuous circle. Verification of experience in a repeating circle and verification of advanced experiences guiding a Mumukshu into a higher spiritual orbit is part of the same total phenomenon. Those ahead and graduated only can guide those who are new entrants.