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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

“O Magnum Mysterium” • Do You Sing This?

Jeff Ostrowski · January 12, 2024

HERE’S A WONDERFUL expression in English: “He can’t see the forest for the trees.” Some—by focusing on details to the exclusion of everything else—end up looking ridiculous. For example, ROBERT F. KENNEDY was born into privilege. When he was a youngster he wanted to “work,” so he got a job delivering newspapers. The only problem is that he used the family chauffeur (!) and Rolls-Royce to deliver the papers. Readers are probably aware that many “trad influencers” often can’t see the forest for the trees when it comes to the sacred liturgy. By spreading false statements about the pre-conciliar liturgy, they often—in my humble opinion—do enormous harm to the so-called TRADITIONAL MOVEMENT. This disturbs me greatly. I believe the Extraordinary Form is extremely important because it emphasizes the continuity of the Catholic Church.

Sacred Liturgy • We sometimes encounter internet folks who insist that “everything before 1954 was absolutely perfect and can’t be improved.” Their minds are made up; it’s pointless to try to persuade them. In reality, however, numerous feasts were added to the liturgical calendar since TRENT which (arguably) should not have been. Especially painful were feasts that “replaced” or “annihilated” feasts whose propers went back at least 1,700 years. One could easily write numerous lengthy dissertations on feasts which have been modified, especially vis-à-vis the seasons of Christmas and Epiphany. Readers can get a ‘hint’ about how complicated these matters are by downloading a special chart created back in 2021.

O MAGNUM MYSTERIUM • The motet “O Magnum Mysterium” by Father Tomás Luis de Victoria (d. 1611) is world famous—and deserves to be. Abbat Joseph Pothier published a plainsong edition in the 1890s. Despite what some claim, this motet is appropriate throughout the season of Epiphany (which originally encompassed the our Savior’s nativity).

Submit Your Version • Do you sing this motet? If so, please send us a recording by your choir and we’ll post it! The following is a ‘live’ recording by my volunteer choir, sung a few weeks ago during Christmas Midnight Mass:

Here’s the direct URL link.

I created individual rehearsal tracks for each voice at #3792.

*  Mp3 Download • Live Recording (14 Jan 2024)

Season of the Epiphany • The readings after Christmas—that is to say, during EPIPHANYTIDE—talk about the events in the early life of our Lord: the naming of Jesus; His Baptism at the River Jordan; the finding in the temple; the Wedding at Cana; and so forth. The following hymn honors the HOLY NAME of our Savior:

To access this hymn’s media in the Brébeuf Portal, click here.

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

Filed Under: Articles Tagged With: Council of Trent, Epiphanytide, Feast of the Holy Family, Feast of the Holy Name, Season of Christmastide, Tomas Luis de Victoria Composer, Tomas Luis Vittoria composer Last Updated: January 18, 2024

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About Jeff Ostrowski

Jeff Ostrowski holds his B.M. in Music Theory from the University of Kansas (2004). He resides with his wife and children in Michigan. —(Read full biography).

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Corpus Christi Watershed

President’s Corner

    PDF Download • “For Pentecost Sunday”
    Yesterday morning, I recorded myself singing the ENTRANCE CHANT for Pentecost Sunday while simultaneously accompanying myself on the pipe organ. Click here to see how that came out. At the end of the antiphon, there’s a triple Allelúja and I just love the chord at the end of the 2nd iteration. The organ accompaniment—along with the musical score for singers—can be downloaded free of charge at the flourishing feasts website. For the record, the antiphon on Pentecost Sunday doesn’t come from a psalm; it comes from the book of Wisdom.
    —Jeff Ostrowski
    PDF Download • “Organ Accompaniment”
    Over the past few years, I’ve been harmonizing all the vernacular plainsong Introit settings by the CHAUMONOT COMPOSERS GROUP. This coming Sunday—10 May 2026—is the 6th Sunday of Easter (Year A). The following declaration will probably smack of “blowing my own horn.” However, I’d rank this accompaniment as my best yet. In this rehearsal video, I attempt to sing it while simultaneously accompanying myself on the pipe organ. The musical score [for singers] as well as my organ accompaniment can be downloaded free of charge from the flourishing feasts website.
    —Jeff Ostrowski
    “Gregorian Chant Quiz” • 4 May 2026
    A few days ago, the CORPUS CHRISTI WATERSHED Facebook page posted this Gregorian Chant quiz regarding a rubric for the SEQUENCE for the feast of Corpus Christi: “Lauda Sion Salvatórem.” There is no audience more intelligent than ours—yet surprisingly nobody has been able to guess the rubric. Drop me an email with the right answer, and I’ll affirm your brilliance to everyone I encounter!
    —Jeff Ostrowski

Quick Thoughts

    “Thee” + “Thou” + “Thine”
    Few musicians realize that various English translations of Sacred Scripture were granted formal approval by the USCCB and the Vatican for liturgical use in the United States of America. But don’t take my word for it! Here are four documents proving this, which you can examine with your own eyes. Some believe the words “Thine” and “Thou” and “Thee” were forbidden after Vatican II—but that’s incorrect. For example, they’re found in the English translation of the ‘Our Father’ at Mass. Moreover, the Revised Standard Version (Catholic Edition) mentioned in those four documents employs “Thine” and “Thou” and “Thee.” It was published with a FOREWORD by Westminster’s Roman Catholic Archbishop (John Cardinal Heenan).
    —Jeff Ostrowski
    “Reminder” — Month of May (2026)
    On a daily basis, I speak to people who don’t realize we publish a free newsletter (although they’ve followed our blog for years). We have no endowment, no major donors, no savings, and refuse to run annoying ads. As a result, our mailing list is crucial to our survival. It couldn’t be easier to subscribe! Just scroll to the bottom of any blog article and enter your email address.
    —Jeff Ostrowski
    Simplified Version • “Canon in D” (Pachelbel)
    I published an article on 11 November 2023 called Wedding March For The Lazy Organist, which rather offhandedly made reference to a simplified version I created in 2007 for Pachelbel’s Canon. I often use it as a PROCESSIONAL for weddings and quinceañeras. Many organists say they “hate” Pachelbel’s Canon. But I love it. I think it’s bright and beautiful. I created that ‘simplified version’ for musicians coming to grips with playing the pipe organ. It can be downloaded as a free PDF if you visit Andrea Leal’s article dated 15 August 2022: Manuals Only: Organ Interludes Based on Plainsong. Specifically, it is page 84 in that collection—generously offered as a free PDF download. Johann Pachelbel (d. 1706) was a renowned German organist, violinist, teacher, and composer of over 500 works. A friend of Bach’s family, he taught Johann Christoph Bach (Sebastian Bach’s eldest brother) and lived in his house. Those who read Pachelbel’s biography will notice his connection to two German cities adopted as famous hymn tune names: EISENACH and ERFURT.
    —Jeff Ostrowski

Random Quote

“There are some so restless that when they are free from labour they labour all the more, because the more leisure they have for thought, the worse interior turmoil they have to bear.”

— Pope Gregory the Great

Recent Posts

  • “Unfair Characterization” • (But Good Question)
  • “Thee” + “Thou” + “Thine”
  • PDF Download • “For Pentecost Sunday”
  • “Reminder” — Month of May (2026)
  • “Englished” Gregorian Chant • 5 Considerations

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