Augustine of Hippo

"We have received Thy mercy, O God, in the midst of Thy people" (ver. 8). Who have received, and where received? Hath not the same Thy people received Thy mercy. If Thy people hath received Thy mercy, how then, "in the midst of Thy people"? As if they who received were one party, they in the midst of whom they received another. A great mystery, but yet well known. When hence also, that is, out of these verses, hath been extracted and brought forth what ye know; it will be not ruder, but sweeter. …

On the Psalms, Psalm 48 ↗

Ambrose of Milan

God's true temple is the body of Christ, and in that body lies the purification of all our sins. Truly, that flesh is God's temple, and in it there is no contagion of sin. On the contrary, it was itself the sacrifice that takes away the sin of all the world. That flesh is indeed God's temple, and in it shone God's image. …

Commentaries on the Twelve Davidic Psalms, On Psalm 48 ↗

Thomas Aquinas

"We have received." Above, the Psalmist set forth the great things of the city; here, however, he sets forth the thanksgiving. And concerning this he does two things. First, the thanksgiving is set forth. Second, people are invited to consider still further the great things of this city, at "Go around." As it is said elsewhere, "All the ways of the Lord are mercy and truth." Hence the thanksgiving pertains first to the effects of divine mercy. …

Exposition on the Psalms of David ↗