In these scriptures, God is talking of His mercy for us that He sent us His son to die for our sins and if He can show such mercy why is it that we can't show some mercy for others? His love and mercy for us never ends so why should our love and mercy end? It all comes down to how we should act and love others who may not be at the place we are or maybe not even know the Lord at all. We shouldn't cram it down their throats or even preach to them, but love them for what they are and where they are. That is showing the true message of the Lord.
Mercy is the story of Sam who was sexually and physically abused as a boy. It follows the struggles that he goes through on his way to be shown and accept mercy so that he can heal. Mercy will also allow him to give and receive love through his relationships despite any hardships that he encounters.