It is stated that the way and method hitherto in use among Catholics for bringing back those who have fallen away from the Church should be left aside and another one chosen, in which matter it will suffice to note that it is not the part of prudence to neglect that which antiquity in its long experience has approved and which is also taught by apostolic authority. The scriptures teach us that it is the duty of all to be solicitous for the salvation of one’s neighbor, according to the power and position of each. The faithful do this by religiously discharging the duties of their state of life, by the uprightness of their conduct, by their works of Christian charity and by earnest and continuous prayer to God. On the other hand, those who belong to the clergy should do this by an enlightened fulfillment of their preaching ministry, by the pomp and splendor of ceremonies especially by setting forth that sound form of doctrine which Saint Paul inculcated upon Titus and Timothy. But if, among the different ways of preaching the word of God that one sometimes seems to be preferable, which directed to non-Catholics, not in churches, but in some suitable place, in such wise that controversy is not sought, but friendly conference, such a method is certainly without fault. But let those who undertake such ministry be set apart by the authority of the bishops and let them be men whose science and virtue has been previously ascertained. For we think that there are many in your country who are separated from Catholic truth more by ignorance than by ill-will, who might perchance more easily be drawn to the one fold of Christ if this truth be set forth to them in a friendly and familiar way.
From the foregoing it is manifest, beloved son, that we are not able to give approval to those views which, in their collective sense, are called by some “Americanism.” But if by this name are to be understood certain endowments of mind which belong to the American people, just as other characteristics belong to various other nations, and if, moreover, by it is designated your political condition and the laws and customs by which you are governed, there is no reason to take exception to the name. But if this is to be so understood that the doctrines which have been adverted to above are not only indicated, but exalted, there can be no manner of doubt that our venerable brethren, the bishops of America, would be the first to repudiate and condemn it as being most injurious to themselves and to their country. For it would give rise to the suspicion that there are among you some who conceive and would have the Church in America to be different from what it is in the rest of the world.
But the true church is one, as by unity of doctrine, so by unity of government, and she is catholic also. Since God has placed the center and foundation of unity in the chair of Blessed Peter, she is rightly called the Roman Church, for “where Peter is, there is the church.” Wherefore, if anybody wishes to be considered a real Catholic, he ought to be able to say from his heart the selfsame words which Jerome addressed to Pope Damasus: “I, acknowledging no other leader than Christ, am bound in fellowship with Your Holiness; that is, with the chair of Peter. I know that the church was built upon him as its rock, and that whosoever gathereth not with you, scattereth.” – from Testem Benevolentiae Nostrae (1899)