In the song, "What a Wonderful World", there is a line that goes, "The bright, blessed day, The dark sacred night". I thought Satchmo was saying, "The bright, blessed day, The dogs say Goodnight"! It wasn't until my family asked why I always said "Woof-woof" at that point that I discovered my mistake!
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
- In the Hail Mary prayer, I used to say 'Bless a dark fowl among women' rather than 'blessed art though'Anon
- "Our father, who art in heaven. Howard be thy name."
I still say "Thank You Howard" when I feel blessed.— cathy - I thought the white circles you see when looking at a bright window were what atoms of air look like.— H.
- I once knew a girl who used to believe that the sun was actaully a really bright gold fish very high up.— meow
- I used to think the song"jesus, oh what a wonderful child so holy, meek and mild" was "so holy, Mickey Mouse"— Stephani