Justified by faith, let us be at peace with God: for justice and peace have embraced one another. Through our Lord Jesus Christ: for Truth has arisen from the earth. Through whom we have access to that grace in which we stand, and our boast is in our hope of God’s glory. He does not say: “of our glory”, but of God’s glory: for justice has not come out of us but has looked down from heaven. Therefore he who glories, let him glory, not in himself, but in the Lord.
For this reason, when our Lord was born of the Virgin, the message of the angelic voices was: Glory to God in the highest, and peace to men of good will.
~St. Augustine, homily