3. In, former ages it was decreed by Popes and Councils and by monastic laws that the whole Psaltery should be recited weekly. Pope St. Pius V., Pope Clement VIII., and Pope Urban VIII. in their revisions of the Breviary ordered this weekly recitation. And even at the present time, such would be the recitation of the Psalter had not the condition of things changed.
4. This arose from the multiplication of saints' offices (officia de sanctis), which after the canonization of saints gradually grew to such a huge number that very often the Dominical and Ferial Office remained unread, and hence not a few psalms were neglected, which yet are as the rest, as St. Ambrose says, "the benediction of the people, the praise of God, the praise offering of the multitude, the acclamation of all, the expression of the community, the voice of the Church, the resounding confession of faith, the truly official devotion, the joy of liberty, the shout of gladness, the re-echoing of joy."
Many complaints from prudent and pious men reached the Pope about the omission of psalms, which took away from those bound to recite the Office not only helps, well suited for God's praises and for the expression of their inmost souls, but also diminished that desirable variety in prayers which is so appreciated and which so well accords with and aids our worthy, attentive, and devout praise of God. For St. Basil says that "in smooth uniformity the soul often grows weary and while present is yet away, but when in psalmody and chant are changed and varied in every hour, the fervour is renewed and its attention is restored."
5. This matter of the reform of the order of the psalter was brought before the Holy See by many bishops and chiefly in the Vatican Council, where the demand for the old custom of reciting the whole psalter weekly was renewed, with the provision that any new arrangement should not impose a greater onus on the clergy, now labouring more arduously in the vineyard of the sacred ministry on account of the diminution of toilers. These requests and wishes were repeated to Pope Pius X., and he took up the matter cautiously, so that the honour due to the cult of the saints should not be diminished, nor the onus on the clergy increased by the weekly recitation of the full Psalter. Begging the help of God, the pontiff formed a commission of learned and industrious men, who with judgment and care carried out his wishes. The results of their labours were submitted to the Sacred Congregation of Rites, and after careful consideration by the members of the Congregation the matter was submitted to the Pope, who sanctioned the new arrangement, that is, as regards the order and the division of the Psalms, Antiphons, Versicles and Hymns, with the rubrics and rules pertaining to the same. And the Pope ordered an authentic edition of these new arrangements to be prepared and issued from the Vatican Press.
6. The arrangement of the Psalter has an intimate connection with the Divine Office and the Liturgy; and by these new decrees regarding the Office and the Psalms a first step in the improvement of the Breviary and the Missal has been taken. These matters will be dealt with by a commission of learned men which is soon to be formed. Amongst other things that this first step established was that the recitation of the Scripture lessons with the proper responses according to the rubrics should receive due honour and more frequent recitation, and that in the Liturgy the most ancient Masses of the Sundays throughout the year, especially those of Lent, should be restored to their places.
7. The use of the old order of Psalms found in the Roman Breviary is abolished and interdicted from 1st January, 1913, and the use of the new Psalter for all clergy, secular and regular, who used the Roman Breviary as revised by Pius V., Clement VIII., Urban VIII., and Leo XIII., and those who continue to use the old order do not satisfy their obligation.
8. Ecclesiastical superiors are to introduce the new order of the Psalter, and chapters are permitted to use it if the majority of the members agree to its introduction.
9. Establishment and declaration of the validity and efficacy of the Bull, notwithstanding all previous apostolic constitutions and rulings, whether general or particular. Any person infringing these papal abolitions, revocations, etc., sins and merits God's anger.
10. Date and place of promulgation.