When I was a kid, I first heard the term Opus Posthumous at about the time I was also hearing about heaven, celestial choirs of angels, etc. So with kid logic, I assumed that when great composers died, they went to heaven, and in heaven one does what one loves best. Thus somehow they composed new music and sent it back to earth for the rest of us to enjoy. I was disappointed to learn that the term merely covered works discovered after the composer's death.
(this could be religion, languages or music - you decide)
A childhood belief about people

others believed things like this
- that when it thunder'd it was angels rolling barrels around heaven.— daniel copeland calif,u.s.
- My older sister used to beleive that when it rained, the angels in heaven were having a spitting contest— Doblica W.
- I used to let go all my balloons so my great grandma would get it in heaven— lissa
- when i was little i used to believe that when you died a helicopter came to take you to heaven— purplefish
- I used to think that when people died, their whole bodies were taken up to heaven, not just their spirits.— Karrie
- i used to believe when you died you went to heaven and played sale of the century!!!!Anon