1 No greater gift could God have given to men than in making His Word, by which He created all things, their Head, and joining them to Him as His members: that the Son of God might become also the Son of man, one God with the Father, one Man with men; so that when we speak to God in prayer for mercy, we do not separate the Son from Him; and when the Body of the Son prays, it separates not its Head from itself: and it is one Saviour of His Body, our Lord Jesus Christ, the Son of God, who both prays for us, and prays in us, and is prayed to by us. He prays for us, as our Priest; He prays in us, as our Head; He is prayed to by us, as our God. Let us therefore recognise in Him our words, and His words in us. Nor when anything is said of our Lord Jesus Christ, especially in prophecy, implying a degree of humility below the dignity of God, let us hesitate to ascribe it to Him who did not hesitate to join Himself unto us....He is prayed to in the form of God, in the form of a servant He prays; there the Creator, here created; assuming unchanged the creature, that it might be changed, and making us with Himself one Man, Head and Body. Therefore we pray to Him, through Him, in Him; and we speak with Him, and He speaks with us; we speak in Him, He speaks in us the prayer of this Psalm, which is entitled, “A Prayer of David.” For our Lord was, according to the flesh, the son of David; but according to His divine nature, the Lord of David, and his Maker....Let no one then, when he hears these words, say, Christ speaks not; nor again say, I speak not; nay rather, if he own himself to be in the Body of Christ, let him say both, Christ speaks, and I speak. Be thou unwilling to say anything without Him, and He says nothing without you....
2. “Bow down Your ear, O Lord, and hear me”. He speaks in the form of a servant: speak thou, O servant, in the form of your Lord: “Bow down Your ear, O Lord.” He bows down His ear, if you dost not lift up your neck: for unto the humble He draws near: from him that is exalted He removes afar off, except whom He Himself has exalted from being humble. God then bows down His ear unto us. For He is above, we below: He in a high place, we in a lowly one, yet not deserted. “For while we were yet sinners, Christ died for us. For scarcely for a just man will one die: yet for a good man perhaps one would even dare to die:” but our Lord died for the wicked. For no merits of ours had gone before, for which the Son of God should die: but the more, because there were no merits, was His mercy great. How sure then, how firm is the promise, by which for the righteous He keeps His life, who for the wicked gave His own death! “For I am poor and in misery.” To the rich then He bows not down His ear: unto the poor and him that is in misery He bows down His ear, that is, unto the humble, and him that confesses, unto him that is in need of mercy: not unto him that is full, who lifts up himself and boasts, as if he wanted nothing, and says, “I thank You that I am not as this Publican.” For the rich Pharisee boasted of his merits: the poor Publican confessed his sins.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)