Sing Until The Song Sings

You're the door that opened me
Walked inside and fell asleep,
Dreamed a dream, awoke,
And then you whispered your dream to me.
In the dream you were a song
One that I was trying to learn.
You taught me to sing you as you sang into my ear, you sang,

Sing until the song sings you.

Then you found a puzzle piece, was a puzzle piece of me,
Put the pieces where they yield your favorite version of me.
Oh to my astonishment, when I beheld your art,
The puzzle completed was a picture of a puzzle taken apart.