3 These men sometimes are observed of the weak sons of light, and their feet totter, when they have seen evil men in felicity to flourish, and they say to themselves, “Of what profit to me is innocence? What does it advantage me that I serve God, that I keep His commandments, that I oppress no one, from no one plunder anything, hurt no one, that what I can I bestow? Behold, all these things I do, and they flourish, I toil.” But why? Would you also wish to be a Ziphite? They flourish in the world, wither in judgment, and after withering, into fire everlasting shall be cast: would you also choose this? Are you ignorant of what He has promised you, who to you has come, what in Himself here He displayed? If the flower of the Ziphites were to be desired, would not Himself your Lord also in this world have flourished? Or indeed was there wanting to Him the power to flourish? Nay but here He chose rather amid the Ziphites to hide, and to say to Pontius Pilate, as if to one being himself also a flower of the Ziphites, and in suspicion about His kingdom, “My kingdom is not of this world.” Therefore here He was hidden: and all good men are hidden here, because their good is within, it is concealed, in the heart it is, where is faith, where charity, where hope, where their treasure is. Do these good things appear in the world? Both these good things are hidden, and the reward of these good things is hidden....
4. “O God, in Your name make me safe, and in Your virtue judge me”. 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 Your virtue judge me.” You have come, O Christ, humble You have appeared, despised You have 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: You sit at the right hand of the Father, and no one sees: Your Spirit thence You have sent, which men that were worthy have received; fulfilled with Your love, the praise of that very humility of Yours throughout the world and nations they have preached: Your name I see to excel among mankind, but nevertheless as weak to us have You 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 says what? “Although He died of weakness, yet He lives 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 has 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 you”? So evidently it is a curse, if He judge you in His virtue; and shall not have saved you in His name: but when in name precedent He shall have saved you, to your health in virtue consequent He shall judge. Be thou without care: that judgment shall not to you be punishment, but dividing. For in a certain Psalm thus is said: “Judge me, O God, and divide my cause from the nation unholy.”...
5. “O God, hearken to my prayer, in Your ears receive the words of my mouth”....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,” 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.” 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....
6. “For aliens have risen up against me”. What “aliens”? Was not David himself a Jew of the tribe of Judah? But the very place Ziph belonged to the tribe of Judah; it was of the Jews. How then “aliens”? Not in city, not in tribe, not in kindred, but in flower....But see the Ziphites, see them for a time flourishing. With reason “alien” sons. You amid the Ziphites hiding said what? “Blessed the people whereof the Lord is its God.” Out of this affection this prayer is being sent forth into the ears of the Lord, when it is said, “for aliens have risen up against me.”
Source: The Enarrations, or Expositions, on the Psalms (New Advent)