20/09/2026
Today we celebrate the 25th Sunday in Ordinary Time. We have chosen the communion chant Tu mandasti to celebrate this Sunday. The text of this piece is taken from Psalm 118:4-5. This is the longest psalm in the Psalter. This psalm presents a profound meditation on the law of God and the good that we attain by guarding and observing it. The text sings, “Tu mandásti mandáta tua custodíri nimis: útinam dirigántur viæ meæ, ad custodiéndas justificatiónes tuas,” which means, “You have ordered your commandments to be kept most diligently. I wish that my ways may be directed so as to keep your justifications.” In this communion chant, the prayerful one at the moment of the mystical union with Christ expresses the joy that comes from the service to God. The essence of love is to obey that tender voice that resounds in our hearts, to follow the loving light that guides us on the way. We pray especially in this piece that our behavior may remain faithful to the will of the Eternal Father and that we join our voice to the psalmist: I pray that what you have commanded may be fulfilled in me! It is a longing that has been stripped of all pride, for if man desires to achieve what God commands him, then he must pray to God to grant him the means to do so. Only with the help of God can man straighten his path, the grace of the Creator guiding our steps firmly along the path of Truth and Justice.
As for the melody, it is composed in mode V. It is impregnated with a certain joy, simple but sincere, which turns into fervent ardor to finally sing a yearning for fidelity and absolute devotion. The piece begins with joy in the heights of the mode, around the dominant, the Do, singing with firm gentleness tu mandásti mandáta tua, you have ordered your commandments. Observe the beautiful accent on the high range of mandasti, Do-Re, underlined by a firm pes quadratus. The gaze of the prayerful is clearly set on the heights in this beginning, the pronoun tu which refers to God invites one to this. In mandáta sounds one of the motives that characterizes this piece: La-B-flat-La Sol. With delicate tenderness and great devotion, the prayerful one chants the word that evokes the divine law that he longs to cultivate, the touch of the semitonal interval, La-B-flat, further strengthens this feeling. The incise closes on the possessive tua with a magnificent tristropha in Do, full of contemplation that reminds us of the pronoun tu and the initial Do: your commandments, O Lord! In custodíri nimis, to be kept most diligently, a leap of a fifth from the dominant to the fundamental, the Fa, the melody starts from the depths of the soul of the prayerful one to progressively rise towards the dominant, even surpassing it by reaching the Re, creating an echo with the beginning of the piece. It is to be noted in the accent of custodíri the motive, La-B-flat-La Sol, which establishes a melodic-verbal nexus of this verb with mandata. The delicate tenderness and great devotion resounds here again, as in mandata. The majestic leap of a fourth in the final syllable reinforced by a bivirga, Sol Do-Do, returns the melodic movement to the high register where the prayerful one sings with great fervor the adverb, nimis, which confers even more semantic force to the infinitive custodíri. A masterful rhythmic amplification clothes the adverb nimis with great firmness, Re-Do Do-Re-Do-La. Text and melody unite, they combine converting the message: here is the essence of Gregorian chant!
In the second phrase, útinam dirigántur viæ meæ, I wish that my ways may be directed, the melody turns into a humble prayer, a longing recitative on which the will to express absolute fidelity is expressed. The presence of the B-flat confers a compositional touch of great mastery to highlight even more, if possible, the strength of the yearning in the prayerful one. It sings of that proximity, that loving closeness that the prayerful one seeks in the Lord, especially at the moment of communion. In fact, without him, we run the great risk of going astray on our way. In viæ meæ, note how the fervent ardor that sounded in nimis reappears, adding a delicate supplication conferred by the magnificent presence of the flat. In the last incise, ad custodiéndas justificatiónes tuas, so as to keep your justifications, we witness another compositional genius with the amplification of the motif of the word custodíri, Fa Sol-La La-B-flat-la Sol La-B-flat-La-Sol La-Sol. Another evidence of the connection, that is so well manifest, in the Gregorian repertoire between the Word and its musical dressing. Custodíri and custodiéndas are not only united by the lexical derivation, and same root but also by a similar musical turn, which resounds at the end of the piece with even greater force if this is possible. As we have already pointed out, we find ourselves with another beautiful piece, a magnificent meditation about the main importance of Christians in keeping the divine precepts. This inner reflection is gaining strength in the interior of the prayerful person who meditates on these verses and who, in the end, makes them spring forth from the exterior of his being in a sung oblation. This is the ultimate meaning of Gregorian chant. This communion chant concludes in justificatiónes tuas with a melodic movement that beautifully captures that insistent desire of the prayerful one, that longing of the soul that repeats itself over and over again to hold on to and to keep the precepts of the Lord so that the Lord will help it to do so. Note the double torculus, La-B-flat-La, which creates yet another melodic-verbal link in the piece between mandáta and justificatiónes. This communion chant is one more jewel of the Gregorian repertoire in which the soul of the prayerful one can express all the nuances of the meditation of the Word, and at the same time, he enlivens it with its chant, aided by the Breath of the Holy Spirit.
Listen to the communion chant •Tu mandasti• here: https://app.neumz.com/listen/missa-tu-mandasti-5/20-09-2026
Image: ©Einsiedeln, Stiftbibliothek 121, f. 142