At my first confession when I was 7, I couldn't think of anything to confess. So I made up some sins and lied to the priest.
That may well have been the first actual sin I've ever committed.
A childhood belief about church

others believed things like this
- I used to think that the priest at church was JESUS.
He had a beard.... it made sense— Joe B - my mum used to say if i lied my eyes would change colour...when i lied i would shut my eyes— kevin rosenqvist
- I used to believe that the closer it was to Sunday, the worse your sins were.— heathen
- I thought when the Big Bang happened it made an actual bang noise— Catte
- I used to think that cotton candy was made from actual cotton so I never wanted to try itAnon
- I used to think my priest was a bit foolish for never having noticed that Dog is God written backwards— anticap