Until the FINAL CURTAIN you won't know how the play ends. You might surmise opine guess. Same with life isn't it?

You won't know how it ends until it's over. Either something lies beyond or it doesn't. Either belief system does not confer superiority on anyone though some may think theirs definitely does. It is all conjecture.

But certitude lives in the heart and minds of homo saps. Certitude about things they cannot possibly KNOW but even so they "know". Silly creatures.