God’s mercy is great.  It’s His amazing mercy that compassionately addresses our plight and wretchedness as broken human beings here on earth.  For only God can forgive and cleanse sinful man when we fall short of His standard.(Which is very often)  And it’s only God that can forgive us of our willful defiance, and disobedience directed towards Him.  But it is only through a personal relationship with His Son, Jesus, that we can attain this Divine forgiveness.