"Only love, only love can leave such a mark, but only love, only love can heal such a scar"
The first time I heard this line it just touched me. I have a well hidden (until now) romantic side, so thoughts like this speak to me in that way.
If you really think about this one, it's pretty deep. Love really is the thing that leaves the deepest most painful marks. Think about all of the times when you have been really deeply hurt, and I would bet that love had something to do with it.
But love is also the only thing that can really heal those scars. Thinking back on those same hurts you will find that it was love in some fashion that brought you back and lifted you back up.