6 “We will go into His tabernacles”. Whose? Those of the Lord God of Jacob. They who enter to dwell therein, are the very same who enter that they may be dwelt in. You enter into your house, that you may dwell therein; into the house of God, that you may be dwelt in. For the Lord is better, and when He has begun to dwell in you, He will make you happy. For if you be not dwelt in by Him, you will be miserable. That son who said, “Father, give me the portion of the goods,” etc., wished to be his own master.
It was well kept in his father's hands, that it might not be wasted with harlots. He received it, it was given into his own power; going to a far country, he squandered it all with harlots. At length he suffered hunger, he remembered his father; he returned, that he might be satisfied with bread. Enter therefore, that you may be dwelt in; and may be not your own, so to speak, but His: “We will go into His tabernacles. We will worship on the spot where His feet stood.” Whose feet?
The Lord's, or those of the house of the Lord itself? For that is the Lord's house, wherein he says He ought to be worshipped. Beside His house, the Lord hears not unto eternal life; for he belongs to God's house, who has in charity been built in with living stones. But he who has not charity, falls; and while he falls, the house stands....
Source: The Enarrations, or Expositions, on the Psalms (New Advent)