8 For when I was “pouring out my soul above myself,” in order to reach my God, why did I do so? “For I will go into the place of Your Tabernacle.” For I should be in error were I to seek for my God without “the place of His tabernacle.” “For I will go into the place of Your wonderful tabernacle, even unto the house of God.”
“I will go,” he says, “into the place of the wonderful tabernacle, even unto the house of God!” For there are already many things that I admire in “the tabernacle.” See how great wonders I admire in the tabernacle! For God's tabernacle on earth is the faithful; I admire in them the obedience of even their bodily members: that in them “Sin does not reign so that they should obey its lusts; neither do they yield their members instruments of unrighteousness unto sin; but unto the living God in good works.” I admire the sight of the bodily members warring in the service of the soul that serves God....And wonderful though the tabernacle be, yet when I come to “the house of God,” I am even struck dumb with astonishment. Of that “house” he speaks in another Psalm, after he had put a certain abstruse and difficult question to himself (viz., why is it that it generally goes well with the wicked on earth, and ill with the good?), saying, “I thought to know this; it is too painful for me, until I go into the sanctuary of God, and understand of the last things.” For it is there, in the sanctuary of God, in the house of God, is the fountain of “understanding.” There he “understood of the last things;” and solved the question concerning the prosperity of the unrighteous, and the sufferings of the righteous. How does he solve it? Why, that the wicked, when reprieved here, are reserved for punishments without end; and the good when they suffer here, are being tried in order that they may in the end obtain the inheritance. And it was in the sanctuary of God that he understood this, and “understood of the last things.”...For he tells us of his progress, and of his guidance there; as if we had been saying, “You are admiring the tabernacle here on earth; how came you to the sanctuary of the house of God?” he says, “In the voice of joy and praise; the sound of keeping holiday.” Here, when men keep festival simply for their own indulgence, it is their custom to place musical instruments, or to station a chorus of singers, before their houses, or any kind of music that serves and allures to wantonness. And when these are heard, what do we passers by say? “What is going on here?” And we are told in answer, that it is some festival. “It is a birthday that is being celebrated” (say they), “there is a marriage here;” that those songs may not appear out of place, but the luxurious indulgence may be excused by the festive occasion. In the “house of God” there is a never-ending festival: for there it is not an occasion celebrated once, and then to pass away. The angelic choir makes an eternal “holiday:” the presence of God's face, joy that never fails. This is a “holiday” of such a kind, as neither to be opened by any dawn, nor terminated by any evening. From that everlasting perpetual festivity, a certain sweet and melodious strain strikes on the ears of the heart, provided only the world do not drown the sounds. As he walks in this tabernacle, and contemplates God's wonderful works for the redemption of the faithful, the sound of that festivity charms his ears, and bears the “hart” away to “the water-brooks.”
Source: The Enarrations, or Expositions, on the Psalms (New Advent)