5 If therefore you feel the passions of this world, even when you are happy, you understand now that you are in the winepress....If therefore the world smile upon you with happiness, imagine yourself in the winepress, and say, “I found trouble and heaviness, and I did call upon the name of the Lord.” He said not, I found trouble, without meaning, of such a kind as was hidden: for some troubles are hidden from some in this world, who think they are happy while they are absent from God. “For as long as we are in the body,” he says, “we are absent from the Lord.” If you were absent from your father, you would be unhappy: are you absent from the Lord, and happy? There are then some who think it is well with them. But those who understand, that in whatever abundance of wealth and pleasures, though all things obey their beck, though nothing troublesome creep in, nothing adverse terrify, yet that they are in a bad case as long as they are absent from the Lord; with a most keen eye these have found trouble, and grief, and have called on the name of the Lord. Such is he who sings in this Psalm. Who is he? The Body of Christ. Who is that? You, if you will: all we, if we will: for Christ's Body is one....
“How lovely are Your tabernacles, O Lord of Hosts”. He was in some tabernacles, that is, in winepresses: but he longed for other tabernacles, where is no pressure: in this he sighed for them, from these, he, as it were, flowed down into them by the channel of longing desire.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)