We "think" or we "believe" there is or there isn't. We cannot KNOW because we limited by our current experience. From that we extrapolate to a "what is" we cannot possibly assess.
Now most of us realize that so we are not hard-nosed or stubborn or rigid. We allow for being wrong about what we "suppose" "Opine" "Believe" "Think" .
So where are we? In the exact same place as everyone else. Until we reach the "after" we don't KNOW.
Only ARROGANCE would cause us to think we do.
Are you?