Am I able to see beyond injury someone did to me, and, in sorrow, be moved to help that one, not just because he wronged me, but that he had it in his heart to wrong me?
Those things are mercy. Mercy never asks if someone deserves mercy, it only asks "is he suffering?"
If it weren't for God's mercy to me, I would still be in those conditions.
"Blessed are the merciful, for they will be shown mercy."