8 Thus “there have been multiplied above the hairs of My head they that hate Me gratis”. How multiplied? So as that they might add to themselves even one out of the twelve. “There have been multiplied above the hairs of My head they that hate Me for nought.” With the hairs of His head He has compared His enemies. With reason they were shorn when in the place of Calvary He was crucified. Let the members accept this voice, let them learn to be hated gratis. For now, O Christian, if it must needs be that the world hate you, why do you not make it hate you gratis, in order that in the Body of your Lord and in this Psalm sent before concerning Him, you may acknowledge your own voice? How shall it come to pass that the world hate you gratis? If you no wise hurtest any one, and art still hated: for this is gratis, without cause...
9. “O God, You have known mine improvidence”. Again out of the mouth of the Body. For what improvidence is there in Christ? Is He not Himself the Virtue of God, and the Wisdom of God? Does He call this His improvidence, whereof the Apostle speaks, “the foolishness of God is wiser than men”? Mine improvidence, that very thing which in Me they derided that seem to themselves to be wise, You have known why it was done. For what was so much like improvidence, as, when He had it in His power with one word to lay low the persecutors, to suffer Himself to be held, scourged, spit upon, buffeted, with thorns to be crowned, to the tree to be nailed? It is like improvidence, it seems a foolish thing; but this foolish thing excels all wise men. Foolish indeed it is: but even when grain falls into the earth, if no one knows the custom of husbandmen, it seems foolish...Improvidence it appears; but hope makes it not to be improvidence. He then spared not Himself: because even the Father spared Him not, but delivered Him up for us all. And of the Same, “Who loved me,” says the Apostle, “and delivered up Himself for me:” for except a grain shall have fallen into the land so that it die, fruit, He says, it will not yield. This is the improvidence. “And my transgressions from You are not concealed.” It is plain, clear, open, that this must be perceived to be out of the mouth of the Body. Transgressions none had Christ: He was the bearer of transgressions, but not the committer. “Are not concealed:” that is, I have confessed to You, all my transgressions, and before my mouth You have seen them in my thought, hast seen the wounds which You were to heal. But where? Even in the Body, in the members: in those believers out of whom there was now cleaving to Him that member, who was confessing his sins.
10. “Let them not blush in Me, that wait for You, O Lord, Lord of virtues”. Again, the voice of the Head, “Let them not blush in Me:” let it not be said to them, Where is He on whom you were relying? Let it not be said to them, Where is He that was saying to you, Believe ye in God, and in Me believe? “Let them not blush in Me, that wait for You,” O Lord, Lord of virtues. Let them not be confounded concerning Me, that seek You, O God of Israel. This also may be understood of the Body, but only if you consider the Body of Him not one man: for in truth one man is not the Body of Him, but a small member, but the Body is made up of members. Therefore the full Body of Him is the whole Church. With reason then says the Church, “Let them not blush in Me, that wait for You, O Lord, Lord of virtues.”...
11. “For because of You I have sustained upbraiding, shamelessness has covered my face”. No great thing is that which is spoken of in “I have sustained:” but that which is spoken of in “for Your sake I have sustained,” is. For if you sustain because you have sinned; for your own sake you sustain, not for the sake of God. For to you what glory is there, says Peter, if sinning you are punished, and you bear it? But if you sustain because you have kept the commandment of God, truly for the sake of God you sustain, and your reward remains for everlasting, because for the sake of God you have sustained revilings. For to this end He first sustained in order that we might learn to sustain...“Shamelessness has covered my face.” Shamelessness is what? Not to be confused. Lastly, it seems to be as it were a fault, when we say, the man is shameless. Great is the shamelessness of the man, that he does not blush. Therefore shamelessness is a kind of folly. A Christian ought to have this shamelessness, when he comes among men to whom Christ is an offense. If he shall have blushed because of Christ, he will be blotted out from the book of the living. You must needs therefore have shamelessness when You are reviled because of Christ; when they say, Worshipper of the Crucified, adorer of Him that died ill, venerator of Him that was slain! Here if you shall blush you are a dead man. For see the sentence of Him that deceives no one. “He that shall have been ashamed of Me before men, I will also be ashamed of him before the Angels of God.” Watch therefore yourself whether there be in you shamelessness; be thou boldfaced, when you hear a reproach concerning Christ; yea be boldfaced. Why do you fear for your forehead which you have armed with the sign of the Cross?...
12. “An alien I have become to My brethren, and a stranger to the sons of My mother”. To the sons of the Synagogue He became a stranger...Why so? Why did they not acknowledge? Why did they call Him an alien? Why did they dare to say, we know not whence He is? “Because the zeal of Your House has eaten Me up:” that is, because I have persecuted in them their own iniquities, because I have not patiently borne those whom I have rebuked, because I have sought Your glory in Your House, because I have scourged them that in the Temple dealt unseemly: in which place also there is quoted, “the zeal of Your House has eaten Me up.” Hence an alien, hence a Stranger; hence, we know not whence He is. They would have acknowledged whence I am, if they had acknowledged that which You have commanded. For if I had found them keeping Your commandments, the zeal of Your House would not have eaten Me up. “And the reproaches of men reproaching You have fallen upon Me.” Of this testimony Paul the Apostle has also made use (there has been read but now the very lesson), and says, “Whatsoever things aforetime have been written, have been written that we might be instructed.”...Why “You”? Is the Father reproached, and not Christ Himself? Why have “the reproaches of men reproaching You fallen upon Me”? Because, “he that has known Me, has known the Father also:” because no one has reviled Christ without reviling God: because no one honours the Father, except he that honours the Son also.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)