heart polishing

I've been thinking about Rumi's "polish your heart" and wondering if it were possible to take my own heart out and polish it, how it might feel.  Would it be harsh or abrasive? Or would that feel soothing and deeply pleasing?  

Perhaps polishing of the heart occurs while it remains inside not requiring a heart surgeon, of sorts, to do the actual polishing.  In this manner, the heart is polished by life and experiences. 

Do the sorrows leave marks, heart breaks lines, and the expansions stretch marks?  How are those polished out?  By love maybe?  What kind of loves polish?  Momentary love, long lasting love or profound love? 

It must be the daily loves, the rituals, the personal that gently polish the mares and wounds.  This polishing would leave fingerprints on the heart, reminders.  

Rumi, were you talking about polishing my own heart or someone else's?  Would you know when you've polished another's heart – brushed up against it in a consequential way?  Perhaps you never know.  

Maybe that is the work of a master heart polisher- to not know when or how the mending occurred nor even that it was needed.