"... the True Church" is the title of a recent Homiletic & Pastoral Review article by James Likoudis. Here is part of the opening:
There is need for Catholics, especially priests, to engage in a convincing Apologetics when confronted by Catholics tempted to become Eastern Orthodox, or by members of the Eastern Orthodox Churches claiming to represent the orthodoxy of the Church before the tragic Schism between East and West, developing after 1054 A.D. Certainly, well-informed Catholics are able to present formidable arguments drawn from the Scriptures, Fathers, and Councils in favor of the Roman Pontiff’s universal authority in the Church, the legitimacy of the doctrine of the Filioque, purgatory, and the Immaculate Conception, not to mention other doctrines questioned or denied by Eastern Orthodox, who assume they constitute the “one, holy, catholic, and apostolic Church,” signified in the Nicene-Constantinople Creed of 381 A.D., indulglng themselves with the repeated assertion made to Catholics.
The question arises: Is there an easy resolution to the conflicting claims of Catholics and Orthodox? The ordinary layman can become bewildered by the study of the complex argument and counter-argument drawn from the appeal to history, and diverse interpretations of Scripture, Fathers, and Councils presented by Catholic and Orthodox writers. As one Orthodox, seeking to end his intellectual agony, stated, “I just keep bouncing back and forth from Catholic to Orthodox and Orthodox to Catholic, feeling myself unable to resolve the dogmatic issues. I do not know Latin or Greek, or much history, who is right and who is wrong.” There must be a simpler and easier way for the ordinary person, who is not a scholar of Church history and patristic theology, and who is confronted by similar Catholic and Orthodox claims—to resolve the question of which is the true Church.
It should be noted that in this matter between Catholics and Orthodox, there is, fortunately, much common ground by which to resolve the issue. In this matter, those seeking the one true Church would obviously hold that there are only two plausible contenders to be the “one, holy, catholic, and apostolic Church.” Both hold that the property of visibility is essential to the true Church. Both Catholics and Orthodox agree that Christian doctrine is something taught by the one, visible Church, not something the individual determines for himself in Protestant fashion, and teaches the Church. Both agree on an objective, visible criterion that served in the first millennium to identify the true Church, i.e., the Church’s necessary rule by Bishops, who are the legitimate successors of the Apostles, and guided by the Holy Spirit, to correctly interpret the Holy Scriptures and apostolic tradition. The great St. Cyprian had already noted in the third century that the Church is essentially built on the bishops: “Does he fancy himself to be with Christ who acts against the Bishops of Christ?” (On the Unity of the Catholic Church §17)
The key question then comes down to this : Which communion of Bishops (Catholic or Eastern Orthodox) constitutes that hierarchy of the Church, founded by Christ to “make disciples of all nations” Matt. 28:19)?