Have you ever stopped smoking pot for awhile. And then started back up again. That first time, things seem so clear you are able to think on such a different level. Its like finding an old friend, remembering what she looked like. Not exactly but kinda around the eyes cuz its been a really long time.
And once you cut through the smoke and reason you realize that you really miss her and you feel better with her in your life.
I actually have several personal intrepretations of this song, I just pick and choose for the situation.