When I first heard the song "What A Wonderful World" in the film "Good Morning Vetnam" (and even later, on the radio), I didn't understand the meaning of the lyrics that went "the bright, blessed day, the dogs say good night," or why talking dogs were part of a wonderful world. It was several years before I finally realized that the correct lyric was actually "the bright, blessed day, the dark, sacred night."
A childhood belief about misheard lyrics

others believed things like this
- The line 'The dark sacred night' in What A Wonderful World is actually 'The dogs say goodnight'...— rebecca
- i thought hot dogs were made from real dogs and sum tasted good sum didnt.— Wayne
- In the Hail Mary prayer, I used to say 'Bless a dark fowl among women' rather than 'blessed art though'Anon
- I always wondered why shepherds washed their socks by night. (correct lyric: watched their flocks)— MaggieNJ
- when I was a child I used to believe...that dogs barking at night were chating about their day job.— Ronald Sanchez
- I used to think the song"jesus, oh what a wonderful child so holy, meek and mild" was "so holy, Mickey Mouse"— Stephani