The Church hails with joy and follows with her maternal blessing every method of guidance and care which aims at a wise and orderly evolution of particular forces and tendencies having their origin in the individual character of each race, provided that they are not opposed to the duties incumbent on men from their unity of origin and common destiny.
She has repeatedly shown in her missionary enterprises that such a principle of action is the guiding star of her universal apostolate. Pioneer research and investigation, involving sacrifice, devotedness and love on the part of her missionaries of every age, have been undertaken in order to facilitate the deeper appreciative insight into the most varied civilizations and to put their spiritual values to account for a living and vital preaching of the Gospel of Christ. All that in such usages and customs is not inseparably bound up with religious errors will always be subject to kindly consideration and, when it is found possible, will be sponsored and developed.
Our immediate predecessor, of holy and venerated memory, applying such norms to a particularly delicate question, took some generous decisions which are a monument to his insight and to the intensity of his apostolic spirit. Nor need We tell you, Venerable Brethren, that We intend to proceed without hesitation along this way. Those who enter the Church, whatever be their origin or their speech, must know that they have equal rights as children in the House of the Lord, where the law of Christ and the peace of Christ prevail.
In accordance with these principles of equality, the Church devotes her care to forming cultured native clergy and gradually increasing the number of native Bishops. And in order to give external expression to these, Our intentions, We have chosen the forthcoming Feast of Christ the King to raise to the Episcopal dignity at the Tomb of the Apostles twelve representatives of widely different peoples and races. In the midst of the disruptive contrasts which divide the human family, may this solemn act proclaim to all Our sons, scattered over the world, that the spirit, the teaching and the work of the Church can never be other than that which the Apostle of the Gentiles preached: “putting on the new, (man) him who is renewed unto knowledge, according to the image of him that created him. Where there is neither Gentile nor Jew, circumcision nor uncircumcision, barbarian nor Scythian, bond nor free. But Christ is all and in all” (Colossians iii. 10, 11).
Nor is there any fear lest the consciousness of universal brotherhood aroused by the teaching of Christianity, and the spirit which it inspires, be in contrast with love of traditions or the glories of one’s fatherland, or impede the progress of prosperity or legitimate interests. For that same Christianity teaches that in the exercise of charity we must follow a God-given order, yielding the place of honor in our affections and good works to those who are bound to us by special ties. Nay, the Divine Master Himself gave an example of this preference for His Own country and fatherland, as He wept over the coming destruction of the Holy City. But legitimate and well-ordered love of our native country should not make us close our eyes to the all-embracing nature of Christian Charity, which calls for consideration of others and of their interests in the pacifying light of love. – from Summi Pontificatus (1939)