Well, I know it's not the song, but the first thing I thought of was Jackson Browne's "For a Dancer."

Just do the steps that you've been shown
By everyone you've ever known
Until the dance becomes your very own
No matter how close to yours another's steps have grown
In the end there is one dance you'll do alone

Not it, but in looking for the lyrics, I was reminded why I like Jackson Browne's songs so much. Wings of butterflies...