From The Gum Thief, by Douglas Coupland:
Or maybe memories are like karaoke--where you realize up on the stage, with all those lyrics scrawling across the screen's bottom, and with everybody clapping at you, that you didn't know even half the lyrics to your all-time favourite song. Only afterwards, when someone else is up on stage humiliating themselves amid the clapping and laughing, do you realize that what you liked most about your favourite song was precisely your ignorance of its full meaning--and you read more into it than maybe existed in the first place. I think it's better not to know the lyrics to your life.
Talking of which, my current favourite song might just be in amongst this lot.