I used to believe that the words of the carol Come all ye faithful were "Come Molly faithful" and always wondered who Molly Faithful was.
A childhood belief about hymns

others believed things like this
- I used to believe that in the Christian Prayer of the Faithful, we were responding, "Lord, harrow prayer."— Smelleanor
- I was told that for every christmas carol i sang before christmas time santa would give me one less present!— K
- I used to believe that all four-letter words are bad words.Anon
- My mom used to say that if I said bad words, poop would appear in my mouth— Nina
- I thought "prison" and "prism" are the same words as each other.Anon
- I once asked my mum when she was a little boy, and I wondered when it was my turn too.— Confused