The following excerpts are taken from William Durandus’ great liturgical commentary, the Rationale Divinorum Officium, book V (which treats of the Divine Office), chapter 9, on Vespers. I have titled it “on Saturday Vespers” because the psalms of Saturday Vespers (143-147, in the traditional arrangement before St Pius X’s reform) are the only ones which he comments on specifically. The part noted * between two red stars * is from the prologue of this same book V, which Durandus himself cites in that place.
At the evening hour, the Church symbolizes the first coming of the Lord, which took place “as the world was coming to its evening” (a citation of the Vespers hymn of Advent, Conditor alme siderum), that is, in the last age. In this regard, it renders thanks to God by singing, according to what the Apostle says, “We are those upon whom the ends of the ages have come.” (1 Cor. 10, 11) Furthermore, Christ was taken down from the cross in the evening, and in the same hour, at the Last Supper, He instituted the sacrament of His body and blood, and washed the feet of the disciples, and manifested himself to the disciples on the road to Emmaus in the likeness of a pilgrim at the breaking of the bread. Rightly therefore does the Catholic Church give thanks to Christ at this hour.
The Deposition of Christ from the Cross, 1634, by the workshop of Rembrandt van Rijn.
Of course, … the office of the following day begins at Vespers, because the evening service, that is the canonical hour, is the first office, according to the custom established by the prophet Ezra, * who taught the people of Israel, when they had return from the Babylonian captivity, to praise God four times in the night and four times in the day. Therefore the evening office belongs to the night, * and for this reason it is named after the evening star (Vesper), which rises at the beginning of the night. …
At this hour, the Church says five psalms, first of all because of the five wounds of Christ, who offered a sacrifice for us in the evening of the world; secondly, for correction, namely, so that we may weep over and ask for forgiveness of our sins, which are committed during the day through the five bodily sense, and come in unto according to what Jeremiah says (9, 21), “death has come in through our windows.” For who is there who does not fall and is not taken by the sense of sight? Thirdly, through the five psalms the Church strengthens itself against the tribulations of the night; for this hour indicates the weeping of them for whom the Sun of justice (Mal. 4, 2) set, and of this it is said (Ps. 29, 6), “In the evening shall weeping abide.” This weeping will last until the morning, that is until the sun which had fallen for sinners will rise upon the faithful, according to the same Psalm, “And in the morning (shall abide) rejoicing. For the same cause also do we strike the breasts with five fingers. …
The psalms are sung according to the meaning of the day; and behold, on the seventh day, that is on Saturday, because of the resurrection which follows, the Office treats of victory and the praise of God which follows victory. Therefore, the first Psalm “Blessed be God” (143) is literally about David’s victory over Goliath (according to its title in the Septuagint and Vulgate), but according to the spiritual sense, it treats of the victory by which we overcome the devil. And since after that victory, it remains only to praise the Lord through whom we have won it, there follow four psalms which are about praise. In the first, the Church sets forth praise: “I will exalt thee, o Lord”; in the second, she urges herself on, saying, “Praise the Lord, o my soul”; in the third, she invites others to join her, “Praise ye the Lord”; in the fourth, she congratulates the heavenly Jerusalem, saying, “Praise the Lord, o Jerusalem.”…
David and Goliath, ca. 1542-44, by Titian
The versicle on Saturday is “May our evening prayer (rise unto Thee, o Lord, and Thy mercy descend upon us)”, and on the other days, “Let my prayer be directed, (o Lord, like incense in Thy sight), both of which signify the evening on which they are sung, in keeping with the sense of the words that follow within the psalm (140) “The lifting up of my hands as an evening sacrifice.” …
The incensation is done so that we may always be the good odor of God (2 Cor. 2, 15), by advancing in knowledge, in teaching, for such must we be because of the promises of God… And therefore at Vespers and at Lauds, after the psalms and the reading … the incense is offered to signify that no one can render a good odor unto God, or give a good example of working to others, which is signified by the incense, unless first he works in the service of God, because which he teaches others through the psalms…
The priest who is senior in the office of the Church, as the one who holds the place of Aaron, ought to offer the incense so that it be an eternal sweet offering before the Lord, and a sweet, fragrant odor, according to the words of the Psalms, “Let my prayer, o Lord, be directed like incense in thy sight.” (right: an 11th century Greek mosaic of Aaron the high priest.)
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