are we what we seem to be?

they say that our universe is just a mere bubble that floats along with other bubbles peacefully. 
yet, it never once touches the radius of another universe that might hold secrets of another life.

we are just a small speck among infinite cosmic patches all over space-time.
we are not alone, but we are not acquainted with strangers from the heavenly world.

and this is what we yearn to know:
is it true that we might have manifested in another form and in another timeline?

if that is true, are we what we seem to be?