How do we know God's mercy is truly great?

The greatness of God's mercy is revealed through His willingness to forgive great sinners. In Psalm 25:11, the Psalmist directly appeals to God's name, stating, 'For thy name's sake, O Lord, pardon my iniquity, for it is great.' This illustrates that God's mercy is not only abundant but is anchored in His character and purpose to glorify Himself through the forgiveness of sins. The New Testament reaffirms this in Ephesians 4:32, where believers are encouraged to forgive one another as God has forgiven them for Christ's sake, highlighting that God's mercy brings Him glory.