Psalms 54:1

"O God, in Thy name make me safe, and in Thy virtue judge me" [Psalm 54:1]. Let the Church say this, hiding amid the Ziphites. Let the Christian body say this, keeping secret the good of its morals, expecting in secret the reward of its merits, let it say this: "In Thy virtues judge me." Thou hast come, O Christ, humble Thou hast appeared, despised Thou hast been, scourged hast been, crucified hast been slain hast been; but, on the third day hast risen, on the fortieth day into Heaven hast ascended: Thou sittest at the right hand of the Father, and no one seeth: Thy Spirit thence Thou hast sent, which men that were worthy have received; fulfilled with Thy love, the praise of that very humility of Thine throughout the world and nations they have preached: Thy name I see to excel among mankind, but nevertheless as weak to us hast Thou been preached. For not even did that Teacher of the Gentiles say, that among us he knew anything, "Save Christ Jesus, and Him crucified;" in order that of Him we might choose the reproach, rather than the glory of the flourishing Ziphites. Nevertheless, of Him he saith what? "Although He died of weakness, yet He liveth of the power of God." He came then that He might die of weakness, He is to come that He may judge in the power of God: but through the weakness of the Cross His name hath been illustrious. Whosoever shall not have believed upon the name made illustrious through weakness, shall stand in awe at the Judge, when He shall have come in power. But, lest He that once was weak, when He shall have come strong, with that fan send us to the left hand; may He "save us in His name, and judge us in His virtue." For who so rash as to have desired this, as to say to God, for instance "Judge me"? Is it not wont to be said to men for a curse, "God judge thee"? […]

There are two ways to interpret the affirmation that he "shall judge the living and the dead." On the one hand, we may understand by "the living" those who are not yet dead but who will be found living in the flesh when he comes; and we may understand by "the dead" those who have left the body or who shall have left it before his coming. Or, on the other hand, "the living" may signify "the righteous," and "the dead" may signify "the unrighteous"—since the righteous are to be judged as well as the unrighteous. For sometimes the judgment of God is passed on the evil people, as in the word, "But they who have done evil [shall come forth] to the resurrection of judgment." And sometimes it is passed on the good, as in the word, "Save me, O God, by your name, and judge me in your strength." Indeed, it is by the judgment of God that the distinction between good and evil is made, to the end that, being freed from evil and not destroyed with the evildoers, the good may be set apart at his right hand. This is why the psalmist cried, "Judge me, O God," and, as if to explain what he had said, "and defend my cause against an unholy nation."

The suffering of the prophet David is … a type of the passion of our God and Lord Jesus Christ. This is why David's prayer also corresponds in sense with the prayer of Christ, who being the Word, was made flesh. As man, Christ suffered all things in a human fashion and spoke in a human fashion in everything he said. He, who bore human infirmities and took on himself the sins of people, approached God in prayer with the humility proper to human beings. This interpretation, even though we are unwilling and slow to receive it, is required by the meaning and force of the words, so that there can be no doubt that everything in the psalm is uttered by David as Christ's mouthpiece. For he says, "Save me, O God, by your name." Thus he prays in bodily humiliation, using the words of his own prophet, the only-begotten Son of God, who at the same time was claiming again the glory that he had possessed from eternity. David asks to be saved by the name of God whereby he was called and wherein he was begotten, in order that the name of God, which rightly belonged to his former nature and kind, might be able to save him in that body wherein he had been born.

"Hear my prayer, O God, give ear to the words of my mouth." The obvious thing for the prophet to say was, "O God, hear me." But because he is speaking as the mouthpiece of him who alone knew how to pray, we are constantly and repeatedly assured that God will hear our prayer. The words of Paul teach us that no one knows how he ought to pray: "For we know not how to pray as we ought." A human being in his weakness, therefore, has no right to demand that his prayer should be heard; for even the teacher of the Gentiles does not know the true purpose and intention of prayer, even after the Lord had provided a model. What we are shown here is the perfect confidence of Jesus, who alone sees the Father, who alone knows the Father, who alone can pray all night long—the Gospel tells us that the Lord continued all night in prayer7—who in the mirror of words has shown us the true image of the deepest of all mysteries in the simple words we use in prayer. And so, in demanding that his prayer be heard and in order to teach us that this was the prerogative of his perfect confidence, David added, "Give ear to the words of my mouth." Now can any person have such confidence that he can desire that the words of his mouth should be heard? It is with words, for instance, that we express emotions and mental instincts, when inflamed by anger, moved by hatred to slander, by flattery to fawn, motivated by hope of gain or fear of shame to lie or by resentment at injury to insult someone? Was there ever a person who was pure and patient throughout his life who was not subject to these human shortcomings? […]

The doctrines of the Gospel were well known to holy and blessed David in his capacity of Prophet, and although it was under the Law that he lived his bodily life, he yet filled, as far as in him lay, the requirements of the Apostolic behest and justified the witness borne to him by God in the words: I have found a man after My own heart, David, the son of Jesse.