11 “I have become feeble, and am bowed down greatly”. He who calls to mind the transcendent height of the Sabbath, sees how “greatly” he is himself “bowed down.” For he who cannot conceive what is that height of rest, sees not where he is at present. Therefore another Psalm has said, “I said in my trance, I am cast out of the sight of Your eyes.” For his mind being taken up there, he beheld something sublime; and was not yet entirely there, where what he beheld was; and a kind of flash, as it were, if one may so speak, of the Eternal Light having glanced upon him, when he perceived that he was not yet arrived at this, which he was able after a sort to understand, he saw where he himself was, and how he was cramped and “bowed down” by human infirmities. And he says, “I said in my trance, I am cast out of the sight of Your eyes.” Such is that certain something which I saw in my trance, that thence I perceive how far off I am, who am not already there. He was already there who said that he was “caught up into the third Heaven, and there heard unspeakable words, which it is not lawful for a man to utter.” But he was recalled to us, in order that, as requiring to be made perfect, he might first mourn his infirmity, and afterwards be clothed with might. Yet encouraged for the ministration of his office by having seen somewhat of those things, he goes on saying, “I heard unspeakable words, which it is not lawful for a man to utter.” Now then what use is it for you to ask, either of me or of any one, the “things which it is not lawful for man to utter.” If it was not lawful for him to utter them, to whom is it lawful to hear them? Let us however lament and groan in Confession; let us own where we are; let us “call the Sabbath to remembrance,” and wait with patience for what He has promised, who has, in His own Person also, showed forth an example of patience to us. “I have become feeble, and bowed down greatly.”
12. “I have roared with the groaning of my heart.” You observe the servants of God generally interceding with groaning; and the reason of it is asked, and there is nothing apparent, but the groaning of some servant of God, if indeed it does find its way at all to the ears of a person placed near him. For there is a secret groaning, which is not heard by man: yet if the thought of some strong desire has taken so strong hold of the heart, that the wound of the inner man finds expression in some uttered exclamation, the reason of it is asked; and a man says to himself, “Perhaps this is the cause of his groaning;” and, “Perhaps this or that has befallen him.” Who can determine, but He in whose Eyes and Ears he groaned? Therefore he says, “I roared with the groaning of mine heart;” because if men ever hear a man's groanings, they for the most part hear but the groaning of the flesh; they do not hear him who groans “with the groaning of his heart.” Some one has carried off his goods; he “roars,” but not “with the groaning of his heart:” another because he has buried his son, another his wife; another because his vineyard has been injured by a hailstorm; another because his cask has turned sour; another because some one has stolen his beast; another because he has suffered some loss; another because he fears some man who is his enemy: all these “roar” with the “groaning of the flesh.” The servant of God, however, because he “roars” from the recollection of the Sabbath, where the Kingdom of God is, which flesh and blood shall not possess, says, “I have roared with the groaning of my heart.”
Source: The Enarrations, or Expositions, on the Psalms (New Advent)