"O Lord, I have loved the beauty of Your house:" of Your Church. "And the place of the habitation of Your glory" [Psalm 26:8]: where You dwell, and art glorified.
What he calls “the glory of your house” is not the beauty of walls or the most expensive table settings, but the most blessed quality of those actions in which the entire church rejoices: namely, the joyful singing of psalms, the holiness of prayers, the most humble devotion of Christian people. Earlier he spoke about the entire church, but now he comes to speak about the saints among whom the glory of God is known to dwell. The Apostle has this to say about them: “For the temple of God is holy—you are that temple.” For by speaking of “dwelling place,” he means the hidden place of the human heart. To this he makes the amazing addition “of your glory,” for wherever God dwells, his glory is there, since he makes glorious whatever place he deems fit to inhabit, and the greatness of the guest house increases due to the merits of the guest.
[AD 430] Augustine of Hippo on Psalms 26:8