26 We feel perfectly confident, however, that the native clergy is animated by lofty purposes and sentiments which conform to the general principles of the Christian religion and entirely correspond with the teachings of the Catholic Church, which embraces all men with the same love; We are also certain that they contribute their share to the real interests of their own nations. In this connection, Our Predecessor very aptly uttered the following words of warning: "The Catholic Church is not a stranger among any people or nation." (47) No Christian community anywhere will ever achieve unity with the Universal Church, from which emanates the supernatural life of Jesus Christ, if the local clergy and population succumb to the influence of a particularist spirit, if they arouse enmity in other nations, and if they are misled and perturbed by an ultra-nationalism which can destroy the spirit of universal charity—that charity upon which the Church of God is built and is called "Catholic." III
Source: Princeps Pastorum (Vatican.va)