Psalm 54:2

“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 only person who could have confidently desired this is one who has not sinned, in whose mouth there has been no deceit, who gave his back to the smiters, who did not turn his cheek away from the blow, who did not avoid scorn and spitting, who never resisted the will of him who ordered it all but was always gladly obedient.

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.

"O God, hearken to my prayer, in Your ears receive the words of my mouth" [Psalm 54:2]....To You may my prayer attain, driven forth and darted out from the desire of Your eternal blessings: to Your ears I send it forth, aid it that it may reach, lest it fall short in the middle of the way, and fainting as it were it fall down. But even if there result not to me now the good things which I ask, I am secured nevertheless that hereafter they will come. For even in the case of transgressions a certain man is said to have asked of God, and not to have been hearkened to for his good. For privations of this world had inspired him to prayer, and being set in temporal tribulations he had wished that temporal tribulations should pass away, and there should return the flower of grass; and he says, "My God, my God, why have You forsaken me?" The very voice of Christ it is, but for His members' sake. "The words," he says, "of my transgressions I have cried to You throughout the day, and You have not hearkened: and by night, and not for the sake of folly to me:" that is, "and by night I have cried, and You have not hearkened; and nevertheless in this very thing that You have not hearkened, it is not for the sake of folly to me that You have not hearkened, but rather for the sake of wisdom that You have not hearkened, that I might perceive what of You I ought to ask. For those things I was asking which to my cost perchance I should have received." Thou ask riches, O man; how many have been overset through their riches? Whence do you know whether to you riches may profit? Have not many poor men more safely been in obscurity; having become rich men, so soon as they have begun to blaze forth, they have been a prey to the stronger? How much better they would have lain concealed, how much better they would have been unknown, that have begun to be inquired after not for the sake of what they were, but for the sake of what they had! In these temporal things therefore, brethren, we admonish and exhort you in the Lord, that you ask not anything as if it were a thing settled, but that which God knows to be expedient for you. For what is expedient for you, you know not at all. Sometimes that which you think to be for you is against you, and that which you think to be against you is for you. For sick you are; do not dictate to the physician the medicines he may choose to set beside you. If the teacher of the Gentiles, Paul the Apostle, says, "For what we should pray for as we ought, we know not," [Romans 8:26] how much more we? Who nevertheless, when he seemed to himself to pray wisely, namely, that from him should be taken away the thorn of the flesh, the angel of Satan, that did buffet him, in order that he might not in the greatness of the revelations be lifted up, heard from the Lord what? Was that done which he wished? Nay, in order to that being done which was expedient, he heard from the Lord, I say, what? "Thrice," he says, "I besought the Lord that He would take it from me; and He said to me, My Grace suffices for you: for virtue in weakness is made perfect." [2 Corinthians 12:8-9] Salve to the wound I have applied; when I applied it I know, when it should be taken away I know. Let not a sick man draw back from the hands of the physician, let him not give advice to the physician. So it is with all these things temporal. There are tribulations; if well you worship God, you will know that He knows what is expedient for each man: there are prosperities; take the more heed, lest these same corrupt your soul, so that it withdraw from Him that has given these things....

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.”