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Pope Saint Paul VI (3 April 1969): “Although the text of the Roman Gradual—at least that which concerns the singing—has not been changed, the Entrance antiphons and Communions antiphons have been revised for Masses without singing.”

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Views from the Choir Loft

Blessed are the Peacemakers

Dr. Peter Kwasniewski · July 4, 2013

AINT THOMAS AQUINAS interprets the Lord’s words “Blessed are the clean of heart” in terms of perfection within oneself, as a necessary disposition to heavenly beatitude (cf. Summa Ia-IIae, Question 69); and he interprets “Blessed are the peacemakers” in terms of perfection towards others, since the work proper to peace is the uniting or harmonizing of what is separated or discordant in human relationships.

Having a clean heart is a prerequisite to being a peacemaker, since knowing what peace truly consists in follows from having a well-ordered or “peaceful” soul. Aristotle makes the same point in the Nicomachean Ethics, where he discusses the wicked man who is at odds with himself, who is fragmented and restless in his consciousness, as opposed to the virtuous man who is at peace—not, mind you, smug or self-satisfied, since he goads himself on to do virtuous deeds (the greater the better); but rather, with the peace of self-possession that comes from self-mastery and habitually cleaving to the good.

Peace among men cannot come from hearts that are not at peace. Relationships of justice among men cannot arise as long as hearts are possessed of unjust desires and ambitions. “Seek first the kingdom of God, and His justice, and all these things shall be added unto you,” says the Lord. One can only promote the peace of another—peace with another and among others—if one first loves the other’s good. Peace demands a good willed for the neighbor for his sake, and the good of another can only be loved by one whose heart is already attracted to the good in itself—that is, by one whose heart is pure. As Kierkegaard once wisely said, “Purity of heart is to will one thing.” Clarity of the heart’s “eye” is what makes it possible to see how great a good peace really is and to know how to foster it; cleanness of heart is the condition of both insight and foresight.

“My peace I leave with you: not as the world gives do I give to you.” Peace of soul is something only God can give us, and without it, we are lost. Indeed, without the peace that comes from resting in God’s will, much of what we do will become harmful to us, as we injure ourselves with our own “good intentions.” It is not enough to do something generically good. We seek to do what God wills, in the manner God wills, and because He wills it: quod Deus vult, quomodo Deus vult, et quia Deus vult.

For this reason, among others, a college that is truly Catholic must pay attention to the spiritual formation of its students. They are not disembodied intellects who are taught mere conceptual doctrines, whether in theology or mathematics or any other discipline; nor are they brute animals who climb the heights to forage and fight like mountain goats. A Catholic student is, first and foremost, an adopted son of God, whose soul needs grace as a plant needs sunlight and moisture to grow, as an animal need fresh air to breathe. A Catholic college allows, beckons, beseeches Holy Mother Church, in the person of her sacred ministers, to nourish students’ souls with the Bread of Angels, to heal their hearts with the absolving balm of Confession, to guide their steps with the reflected light of spiritual direction, to surround them with all the great and small reminders of our true origin and destiny, our Alpha and Omega. She makes this an explicit goal of her institutional life and culture.

True, a college as such exists to offer an academic curriculum. A Catholic college, however, must do more, and joyfully does more: it is not one-dimensional but three-dimensional. It offers a spiritual training ground in which the immediate goal of academic formation, of cultivating intellectual virtues, comes together with ongoing formation in and exercise of the moral and theological virtues. This tightly-knit threefold cord of theological virtue, intellectual virtue, and moral virtue is what binds into unity the many elements of a Catholic’s daily life, and in a special way, a student’s life. What a joy it is to see this unity emerge, year by year, as our students drink in peace from the Lord’s glorious wounds and seek to be peacemakers in a wounded world.

Opinions by blog authors do not necessarily represent the views of Corpus Christi Watershed.

Filed Under: Articles Last Updated: January 1, 2020

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About Dr. Peter Kwasniewski

A graduate of Thomas Aquinas College (B.A. in Liberal Arts) and The Catholic University of America (M.A. and Ph.D. in Philosophy), Dr. Peter Kwasniewski is currently Professor at Wyoming Catholic College. He is also a published and performed composer, especially of sacred music.

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President’s Corner

    Pipe Organ “Answers” in Plainsong?
    In 2003, I copied a book by Félix Bélédin (d. 1895), who was titular organist—from 1841 to 1874—at the Cathedral of Saint John the Baptist in Lyon (France). In 2008, we scanned and uploaded the book to the Lalande Online Library. Nobody knows for sure when the book was published; some believe it first appeared in the 1840s. In any event, one who examines this excerpt, showing GLORIA IX might wonder why it says the organ answers in plainsong. However, the front of the book explains, telling the organist explicitly when to “respond in plainchant.” This is something called organ alternatim. Believe it or not, the pipe organ would take turns with the choir, playing certain texts instrumentally instead of having them sung. I’m not very well-versed in this—pardon the pun—but if memory serves, ORGAN ALTERNATIM was frowned upon by the time of Pope Saint Pius X. Nevertheless, French organists kept doing it, even after it was explicitly condemned as an abuse.
    —Jeff Ostrowski
    Music List • (5th Sunday of Lent)
    Readers have expressed interest in seeing the ORDER OF MUSIC I created for this coming Sunday, which is the 5th Sunday of Lent (22 March 2026). If such a thing interests you, feel free to download it as a PDF file. Traditionally, this Sunday was called ‘Passion’ Sunday. Starting in 1956, certain church leaders attempted rename both ‘Passion’ Sunday and ‘Palm’ Sunday—but it didn’t work. For example, Monsignor Frederick McManus tried to get people to call PALM SUNDAY “Second Passion Sunday”—but the faithful rejected that. I encourage all the readers to visit the feasts website, where the Propria Missae may be downloaded completely free of charge.
    —Jeff Ostrowski
    Music List • (Holy Thursday, 2026)
    Readers have expressed interest in seeing the ORDER OF MUSIC I created for Holy Thursday, which is 2 April 2026. If such a thing interests you, feel free to download it as a PDF file. I’m not sure I’ve ever heard a more piercingly beautiful INTROIT, and I have come to absolutely love the SATB version of ‘Ubi cáritas’ we are singing (joined by our burgeoning children’s choir). I encourage all the readers to visit the feasts website, where the Propria Missae may be downloaded completely free of charge.
    —Jeff Ostrowski

Quick Thoughts

    “Gregorian Chant Quiz” • 24 March 2026
    How well do you know your Gregorian hymns? Do you recognize the tune inserted into the bass line on this score? For many years, we sang the entire Mass in Gregorian chant—and I mean everything. As a result, it would be difficult to find a Gregorian hymn I don’t recognize instantly. Only decades later did I realize (with sadness) that this skill cannot be ‘monetized’… This particular melody is used for a very famous Gregorian hymn, printed in the LIBER USUALIS. Do you recognize it? Send me an email with the correct words, and I promise to tell everybody I meet about your prowess!
    —Jeff Ostrowski
    PDF Download • “Ubi Caritas” (SATB)
    I remember singing “Ubi Cáritas” by Maurice Duruflé at the conservatory. I was deeply moved by it. However, some feel Duruflé’s version isn’t suitable for small choirs since it’s written for 6 voices and the bass tessitura is quite low. That’s why I was absolutely thrilled to discover this “Ubi cáritas” (SATB) for smaller choirs by Énemond Moreau, who studied with OSCAR DEPUYDT (d. 1925), an orphan who became a towering figure of Catholic music. Depuydt’s students include: Flor Peeters (d. 1986); Monsignor Jules Van Nuffel (d. 1953); Arthur Meulemans (d. 1966); Monsignor Jules Vyverman (d. 1989); and Gustaaf Nees (d. 1965). Rehearsal videos for each individual voice await you at #19705. When I came across the astonishing English translation for “Ubi Cáritas” by Monsignor Ronald Knox—matching the Latin’s meter—I decided to add those lyrics as an option (for churches which have banned Latin). My wife and I made this recording to give you some idea how it sounds.
    —Jeff Ostrowski
    PDF Download • “Holy, Holy, Holy”
    For vigil Masses on Saturday (a.k.a. “anticipated” Masses) we use this simpler setting of the “Holy, Holy, Holy” by Monsignor Jules Vyverman (d. 1989), a Belgian priest, organist, composer, and music educator who ultimately succeeded another ‘Jules’ (CANON JULES VAN NUFFEL) as director of the Lemmensinstituut in Belgium. Although I could be wrong, my understanding is that the LEMMENSINSTITUUT eventually merged with “Catholic University of Leuven” (originally founded in 1425). That’s the university Fulton J. Sheen attended.
    —Jeff Ostrowski

Random Quote

Indeed I might add that although unfamiliar with it myself, the Extraordinary Form expressly reminds us that Mass in either form is not merely a communion meal but a ritual of love, a sacrifice at Calvary, by which, for you and for me, yes, here and now, Jesus Christ lays down his life.

— ‘Most Rev. Philip Egan, Bishop of Portsmouth’

Recent Posts

  • Pipe Organ “Answers” in Plainsong?
  • “Gregorian Chant Quiz” • 24 March 2026
  • “Versions of the Psalter” • Jeff Interviews Top Biblical Scholar: Dr. Mark Giszczak
  • PDF Download • “Ubi Caritas” (SATB)
  • Summer 2026 • “Gregorian Chant Course” at Aquinas College (Nashville, TN)

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