The words are from "The Natural Trend of Breathing" By Someday Never. It is a really awesome song, but almost nobody knows about it, which sucks. Well it might be a little hard to read (sorry bout that :/ ) so heres what it says:

Your smile runs right through me
It kills to see you happy
But last time I checked
"Happy" needs a heart thats beating.

It's a really awesome song. You should listen to it :) . Well anyway i got the pic from here. I love the look on the girls face. Well anyway I hope you guys like the card :D