To Heal.

I guess I am on a new quest.
A cut eventually heals itself.
A burn? The same.
Skin wounds. I guess they all have some sort of capability to heal, to reconnect the cells, the binding material.
Bones. I suppose the can heal themselves, again, reattaching.
Time. Give them time, and things can get better.  Bandages, salve, stitches, casts.
But, neither skin nor bone can do it without a scar, a mark, an evidence to the harm done.
So how do emotions heal.
What is the bandage or salve? What is the stitch or cast?