From Pope Pius XI’s encyclical Quas Primas (1925):
The many notable and memorable events which have occurred during this Holy Year have given great honor and glory to Our Lord and King, the Founder of the Church.
At the Missionary Exhibition men have been deeply impressed in seeing the increasing zeal of the Church for the spread of the kingdom of her Spouse to the most far distant regions of the earth. They have seen how many countries have been won to the Catholic name through the unremitting labor and self-sacrifice of missionaries, and the vastness of the regions which have yet to be subjected to the sweet and saving yoke of our King. All those who in the course of the Holy Year have thronged to this city under the leadership of their Bishops or priests had but one aim—namely, to expiate their sins—and at the tombs of the Apostles and in Our Presence to promise loyalty to the rule of Christ.
A still further light of glory was shed upon his kingdom, when after due proof of their heroic virtue, We raised to the honors of the altar six confessors and virgins.* It was a great joy, a great consolation, that filled Our heart when in the majestic basilica of St. Peter Our decree was acclaimed by an immense multitude with the hymn of thanksgiving, Tu Rex gloriæ Christe. We saw men and nations cut off from God, stirring up strife and discord and hurrying along the road to ruin and death, while the Church of God carries on her work of providing food for the spiritual life of men, nurturing and fostering generation after generation of men and women dedicated to Christ, faithful and subject to him in his earthly kingdom, called by him to eternal bliss in the kingdom of heaven.
Moreover, since this jubilee Year marks the sixteenth centenary of the Council of Nicæa, We commanded that event to be celebrated, and We have done so in the Vatican basilica. There is a special reason for this in that the Nicene Synod defined and proposed for Catholic belief the dogma of the Consubstantiality of the Only-begotten with the Father, and added to the Creed the words “of whose kingdom there shall be no end,” thereby affirming the kingly dignity of Christ.
— Quas Primas 2-5
* These were the saints canonized by Pius XI in 1925:
- St. Thérèse of Lisieux, Virgin and Doctor of the Church
- St. Peter Canisius, Confessor and Doctor of the Church
- St. Madeleine Sophie Barat, Virgin
- St. Marie-Madeleine Postel, Virgin
- St. Jean Marie Vianney, Confessor
- St. Jean Eudes, Confessor