When it comes down to the bare bones, we have no claim on God. Our only hope is in His benevolent intentions toward us, His fallen creatures.
Mercy is an intangible of inestimable value. It is a quality of character which was captured by the Bard in his Merchant of Venice.
Jeremiah recognized God's faithfulness and mercy in Lamentations. It is the basis for the old hymn "Great Is Thy Faithfulness" which has been a rock in my personal foundation of faith. "Morning by morning new mercies I see." Each day brings forth another of God's mercies towards us.
In the Catholic ritual, the Kyrie expresses both the plea for the Lord to have mercy and the gratitude that the Lord is continually being merciful.
Mercy isn't given once and then withdrawn. God is faithful to extend mercy to us literally forever. It is only by His mercy that we have the means to spend eternity with Him. Christmas is the greatest mercy of all.
Open our eyes to see Your great mercies in our daily lives. Make us truly grateful for Your kindness toward us. Grant us the favor of walking closely with You.
In Jesus' most precious name. Amen.