How can I adequately describe that feeling?

That feeling that comes from the instant when you hear just the first few notes of the right song and your heart swells and you become overwhelmed with a rush of memories of a day in the fall. A day that maybe never actually happened. Just an idealized end result of a collection of almost perfect moments. The crisp air. The color and the anticipation. The possibility. That smell that escapes from the chimneys that wraps me in a feeling of complete comfort.
Those clouds.
 And at one time I would have called it infinite.
And at one time it was all I had.
And sometimes it makes me cry.

I love that feeling.