from Into the Woods, by Stephen Sondheim.
Pay very close attention to the lyrics. There are phenomenal lessons in this song. If you're curious, go find the whole show and watch it. Into the Woods is one of the most powerful musicals I know, dealing with parenthood, enlightenment, the Force (in their own way), and really learning how to find good judgment in a world where morality has been blurred to nothing.
ALSO: bonus:
If you want a more "popular" rendering of the song, if musical theatre isn't really your thing. Here's kind of a hybrid:
