21 Lastly, would you know what is that Darling? Read the words following: “I will confess unto You, O Lord, in the great Congregation; in a weighty people will I praise You”. Truly says He, “I will confess unto You:” for confession is made in all the multitude, but not in all is God praised: the whole multitude hears our confession, but not in all the multitude is the praise of God. For in all the whole multitude, that is, in the Church which is spread abroad in the whole world, is chaff, and wheat: the chaff flies, the wheat remains; therefore, “in a weighty people will I praise You.” In a weighty people, which the wind of temptation carries not away, in such is God praised. For in the chaff He is ever blasphemed....
22. “Let not them that are Mine enemies wrongfully rejoice over Me:” for they rejoice over Me because of My chaff. “Who hate Me without a cause;” that is, whom I never hurt; “winking with their eyes”: that is, pretending hypocrites, “For they spoke indeed peace to Me”. What is, “winking with their eyes”? Declaring by their looks, what they carry not in their heart. And who are these “winking with their eyes”? “For they spoke indeed peace to Me; and with wrath devised craftily.” “Yea they opened their mouth wide against Me”. First winking with their eyes, those lions sought to ravish and devour; first fawning they spoke peace, and then with wrath devised craftily. What peace spoke they? “Master, we know that Thou acceptest not man's person, and teachest the way of God in truth. Is it lawful to give tribute unto Cæsar, or not?” They spoke indeed peace unto Me. What then? Did You not know them, and they deceived You, winking with their eyes? Truly He knew them; therefore said He, “Why do you tempt Me, you hypocrites?” Afterward, “they opened their mouth wide against Me,” crying, “Crucify Him, Crucify Him! and said, Aha, Aha, our eyes have seen it.” This, when they insulted Him, “Aha, Aha, Prophesy unto us, Thou Christ.” As their peace was pretended when they tempted Him concerning the money, so now insulting was their praise. “They said, Aha, Aha, our eyes have seen it”: that is, Your deeds, Your miracles. This Man is the Christ. “If He be the Christ, let Him come down from the Cross, and we will believe Him. He saved others, Himself He cannot save.” “Our eyes have seen it.” This is all whereof He boasted Himself, when “He called Himself the Son of God.” But the Lord was hanging patient upon the Cross: His power had He not lost, but He showed His patience. For what great thing was it for Him to come down from the Cross, who could afterward rise again from the sepulchre? But He seems to have yielded to His insulters; and this, beloved, that having risen again He should show Himself to His own, and not to them, and this is a great mystery; for His resurrection signified the New Life, but the New Life is known to His friends, not to His enemies.
23. “This You have seen, O Lord; keep not silence”. What is, “keep not silence”? Judge Thou. For of judgment is it said in a certain place, “I have kept silence; shall I keep silence for ever?” And of the delaying of judgment it is said to the sinner, “These things have you done, and I kept silence;” “You thought that I was altogether such an one as yourself.” How keeps He silence, who speaks by the Prophets, who speaks with His own mouth in the Gospel, who speaks by the Evangelists, who speaks by us, when we speak the truth? What then? He keeps silence from judgment, not from precept, not from doctrine. But this His judgment the Prophet in a manner invokes, and predicts: “You have seen, O Lord: keep not silence;” that is, You will not keep silence, needs must that You will judge. “O Lord, be not far from Me.” Until Your judgment come, be not far from Me, as You have promised, “Lo, I am with you always, even unto the end of the world.”
24. “Arise, Lord, and attend to My judgment”. To what judgment? That You are in tribulation; that You are tormented with labours and pains? Do not even many wicked men suffer the same? To what judgment? Therefore are You righteous, because Thou sufferest these things? No: but what? “To My judgment.” What follows? “Attend to My judgment; even to My cause, My God, and My Lord.” Not to My punishment, but to My cause: not to that which the robber has in common with Me, but to that whereof is said, “Blessed are they which are persecuted for righteousness' sake.” For this cause is distinguished. For punishment is equal to good and bad. Therefore Martyrs, not the punishment, but the cause makes, for if punishment made Martyrs, all the mines would be full of Martyrs, every chain would drag Martyrs, all that are executed with the sword would be crowned. Therefore let the cause be distinguished; let none say, because I suffer, I am righteous. Because He who first suffered, suffered for righteousness' sake, therefore He added a great exception, “Blessed are they which are persecuted for righteousness' sake.” For many having a good cause do persecution, and many having a bad cause suffer persecution. For if persecution could not be done rightly, it had not been said in a certain Psalm, “Whoso privily slanders his neighbour, him did I persecute.”...Let none then say, I suffer persecution: let him not sift the punishment, but prove the cause: lest if he prove not the cause, he be numbered with the ungodly. Therefore how watchfully, how excellently has This Man recommended Himself, “O Lord, attend to My judgment,” not to My punishments; “even to My cause, My God, and My Lord.”
25. “Judge me, O Lord, according to My righteousness”; that is, attend to My cause. Not according to My punishment, but “according to My righteousness, O Lord, My God,” that is, according to this judge Thou Me. “And let them not rejoice over Me;” that is, Mine enemies.
26. “Let them not say in their heart, Aha, aha, so would we have it”; that is, We have done what we could, we have slain him, we have taken him away. “Let them not say:” show them that they have done nothing. “Let them not say, We have swallowed him up.” Whence say those Martyrs, “If the Lord had not been on our side, then they had swallowed us up quick.” What is, “had swallowed us up”? Had passed into their own body. For that you swallow up, which you pass into your own body. The world would swallow you up; swallow thou the world, pass it into your own body: kill and eat. As it was said to Peter, “Kill and eat;” do thou kill in them what they are, make them what you are. But if they on the other hand persuade you to ungodliness, you are swallowed up by them. Not when they persecute you are you swallowed up by them, but when they persuade you to be what they are. “Let them not say, We have swallowed him up.” Do thou swallow up the body of Pagans. Why the body of Pagans? It would swallow you up. Do thou to it, what it would to you. Therefore perhaps that calf, being ground to powder, was cast into the water and given to the children of Israel to drink, that so the body of ungodliness might be swallowed up by Israel. “Let them be ashamed and brought to confusion together that rejoice at mine hurt: let them be clothed with shame and dishonour”; so that we may swallow up them ashamed and brought to confusion. “Who speak evil against me:” let them be ashamed, let them be brought to confusion.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)