The human Soul is given a body,
for the opportunity to live in this world
for the sole purpose of learning and growing.
Since virtually nobody ever reaches anything
even remotely resembling perfection,
or has enough time, in one lifetime,
to experience everything this world has to offer,
we must return time and time again,
in a cycle of life situations,
each aimed at a gradual, progressive Soul-growth:
a self-perfecting which eventually leads to spiritual maturity.
This allows us to then move on to a higher level of awareness …
a higher plane of existence, so to speak.
This process is, of course, known as reincarnation or rebirth.
With a little use of Reason, the idea of re-birth becomes very plausible and makes perfect sense!
