3 Yet do not take what I have said, my brethren, in such a way, as if God does not hear those who have gold and silver, and a household, and farms, if they happen to be born to this estate, or hold such a rank in the world: only let them remember the Apostle's words: “Charge those who are rich in this world, that they be not highminded.” For those that are not highminded are poor in God, and to the poor and needy and those in want He inclines His ear. For they know that their hope is not in gold and silver, nor in those things in which for a time they seem to abound. It is enough that riches ruin them not; it is enough that they do them no harm: for good they can do them none. What certainly profits is a work of mercy, done by a rich or by a poor man: by a rich man, with will and deed; by a poor man, with will alone. When therefore he is such an one as despises in himself everything which is wont to swell men with pride, he is one of God's poor: He inclines unto him His ear, for He knows that his heart is contrite....Was it really for the merit of his poverty that the poor man was carried away by Angels, or was it for the sin of his riches that the rich man was sent away to be tormented? In that poor man is signified the honour which is paid to humility, in that rich man the condemnation which awaits pride. I will prove shortly that it was not riches but pride which was tormented in that rich man. It is certain that the poor man was carried into the bosom of Abraham: of Abraham himself Scripture says that he had here very much gold and silver, and was rich on the earth. If every one that is rich is hurried away to be tormented, how could Abraham have gone before that poor man, so as to be ready to receive him when carried to his bosom? But Abraham in his riches was poor, humble, reverencing all commands, and obeying them. So true was it that he counted all those riches for nothing, that on God's command he was ready to sacrifice his son, for whom he was keeping his riches. Learn therefore ye to be poor and needy, whether you have anything in this world, or whether you have not....
4. “Preserve My Soul, for I am holy”. I know not whether any one could say this, “I am holy,” but He who was in the world without sin: He by whom all sins were not committed but remitted. We own it to be His voice saying, “Preserve My Soul, for I am holy;” of course in that form of a servant which He had assumed. For in that was flesh, in that, was also a Soul. For He was not, as some have said, only Flesh and the Word: but Flesh and Soul also, and the Word, and all this, One Son of God, One Christ, One Saviour; in the form of God equal to the Father, in the form of a servant the Head of the Church. When therefore I hear, “for I am holy,” I recognise His voice: yet do I exclude my own? Surely He speaks inseparably from His body when He speaks thus. Shall I then dare to say, “For I am holy”? If holy as making holy, and as needing none to sanctify, I should be proud and false: but if holy as made holy, as it is written, “Be holy, for I am holy,” then the body of Christ may venture, and that one Man “crying from the end of the earth,” may venture with his Head, and under his Head, to say, “For I am holy.” For he has received the grace of holiness, the grace of Baptism, and of remission of sins....Say unto your God, I am holy, for You have sanctified me: because I received, not because I had: because You gave, not because I deserved. For on another side you are beginning to do an injury to our Lord Jesus Christ Himself. For if all Christians who are faithful and have been baptized in Him have put Him on, as the Apostle says, “As many as are baptized in Christ have put on Christ:” if they have been made members of His body, and say that they are not holy, they do injury to their Head, of whom they are members, and yet not holy. Look thou where you are and from your Head assume dignity. For thou were in darkness, “but now light in the Lord.” “You were sometime darkness,” he says: but did ye remain darkness? Was it for this the Enlightener came, that you might still remain darkness, or that in Him ye might become light? Therefore, every Christian by himself, therefore also the whole body of Christ, may say, it may cry everywhere, while it suffers tribulations, various temptations and offenses, it may say, “Preserve my soul, for I am holy: my God, save Your servant, that puts his trust in You.” See thou, that holy man is not proud, since he puts his trust in God.
5. “Be merciful unto me, O Lord, for I have cried unto You all day”. Not “one day:” understand “all day” to mean continually: from the time that the body of Christ groans being in afflictions, until the end of the world, when afflictions pass away, that man groans and calls upon God: and each one of us after his measure has his part in that cry in the whole body. You have cried in your days, and your days have passed away: another has come after you, and cried in his days: and thou here, he there, another elsewhere: the body of Christ cries all the day, its members departing and succeeding one another. One Man it is that reaches to the end of the world: the same members of Christ cry, and some members already rest in Him, some still cry, some when we shall be at rest will cry, and after them others will cry. It is the whole body of Christ whose voice He hears, saying, “Unto You have I cried all the day.” Our Head on the right hand of the Father intercedes for us: some members He recovers, others He scourges, others He cleanses, others He comforts, others He is creating, others calling, others recalling, others correcting, others restoring.
6. “Make glad the soul of Your servant: for unto You, O Lord, have I lifted up my soul”. Make it glad, for unto You have I lifted it up. For it was on earth, and from the earth it felt bitterness: lest it should wither away in bitterness, lest it should lose all the sweetness of Your grace, I lifted it up unto You: make it glad with Yourself. For You alone are gladness: the whole world is full of bitterness. Surely with reason He admonishes His members to lift up their hearts. May they hear and do it: may they lift up unto Him what on earth is ill. There the heart decays not, if it be lifted up to God. If you had grain in your rooms below, you would take it up higher, lest it should grow rotten. Would you remove your grain, and do you suffer your heart to rot on the earth? You would take your grain up higher: lift up your heart to heaven. And how can I, do you say? What ropes are needed? What machines? What ladders? Your affections are the steps: your will the way. By loving you mount, by neglect you descend. Standing on the earth you are in heaven, if you love God. For the heart is not so raised as the body is raised: the body to be lifted up changes its place: the heart to be lifted up changes its will.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)