Everyone is born with original sin from being born from Adam and Eve. Many or most never question this concupiscence.
In my experience, folks who have been actively working on heresy and inquisitions for years if not decades are the first to admit that they too carry rebellious, largely hereditary, inclinations towards sin.
A lot of people don't seem to grok original sin.
As a christian I feel this is a major thing: the realization that you can be perfectly innocent in that you:
- didn't do anything that any law can punish you for
- wasn't aware of doing anything wrong as you were doing it
yet you are far from perfect and when you minutes/days/years later you realize despite your best intentions you still bragged/discriminated/were unfair/went too far/didn't go far enough/etc and you'll be sorry and wish you could do better.
To keep this interesting to everyone in this audience I think I'll avoid going further into the topic unless anyone asks but for anyone particularly interested I'll say that I think this is what Paul grapples with in in Romans 7.
https://activechristianity.org/who-will-deliver-me-from-this...
I started by reading the top but it actually covers a lot of the topics in this thread from a christian perspective.