When attending Catholic mass as a kid, I thought the final thing said was not "Thanks be to God" but rather "Thanks, speedy God". I was always dying to get out of mass as quickly as possible and I was glad that the rest of the congregation felt the same way! (at least until I realized what they were really saying)
A childhood belief about church

others believed things like this
- I am Catholic. I used to believe that the Father presenting the Mass was in fact God himself.— Lindsey
- Since we receive bread at Mass, I thought he was called "Jesus Crust" Seemed pretty obvious!Anon
- when i was little i asked what time midnight mass started.
i honestly had no idea.— what time?? - When I was little, I thought dying your hair would give you the color AND hairstyle displayed on the box. Anon
- When I was little I thought that dying your hair means you kill your hair.Anon
- My mother, the good Catholic, thought that Jesus, being a string bean (supreme being) was really skinny.— Mark D