“On the other hand, this concern of preserving intact the ancient liturgies, has not prevented certain rites, borrowed from other Churches, from being admitted into the Oriental ritual. Gregory XVI of blessed memory wrote about these to the Armenian Catholics, “your ancestors, either admired them because they seemed more fitting and beautiful or, introduced them at various periods as a distinctive mark separating themselves from heretics and schismatics.”…Liturgical innovations of this nature proposed for the purpose of purifying the Oriental rites and restoring them to their pristine integrity are a pretext and therefore invalid. Indeed the liturgy of the Ruthenians can be no other than that which was either instituted by the holy fathers of the Church or ratified by the canons of synods or introduced by legitimate use, always with the express or tacit approval of the Apostolic See. If variations have occurred in this liturgy in the course of time, they have been instituted after consultation with the Roman Pontiffs and for the express purpose of freeing such rites from any taint of heresy or schism and expressing Catholic teaching more correctly and clearly for the preservation of the faith and the good of souls…Moreover, venerable brothers, We exhort you, also, who with such labor and singular zeal have undertaken the care of the Ruthenians entrusted to you, to preserve scrupulously the liturgical practice approved by the Apostolic See or introduced with its knowledge and without its censure. Reject totally any innovation, and take care to instruct pastors and priests to observe most accurately, even under the strictest sanction of penalties, if need be, the sacred canons on these matters, especially those of the Synod of Zamosi.”