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Orthodox Ecclesiology - Lesson 2: The Unity of the Church and the Mystery of Baptism

Archpriest Peter Heers

The Unity of the Church and the Mystery of Baptism

This is the second lesson of our 10 week course, "Orthodox Ecclesiology: The One, Holy, Catholic and Apostolic Church and the Pan-Heresy of Syncretistic Ecumenism".

This is the second lessson of a 10 week course, which also includes - for all patrons - a separate 2 hour Q&A session every Thursday @ 9 PM EST, 6 PM PST. (To become a patron visit:

This second lesson will be live-streamed on The Orthodox Ethos YouTube Channel, as well as via Facebook (both our profile and page, as well as the Orthodox Survival Course group).

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In Lesson Two, we will look at the early approach to the boundaries of the Church and, in particular, the Mystery of Baptism as (together with Chrismation and Communion) the rite of initiation by considering some of the most fundamental sources of Holy Tradition in the 3rd century, such as the Treatise on Church Unity by St. Cyprian of Carthage, the epistle of St. Firmilian of Caesarea and the so-called “Baptism Controversy”, as well as the Fourth Century teaching of the Church Fathers, such as St. Basil the Great and St. John Chrysostom, but also with the help of contemporary dogmatic theologians who have remained faithful to their understanding and vision - that of the One, Holy, Catholic and Apostolic Church throughout the ages.

It is hard to underestimate the importance of acquiring the Orthodox outlook on the Church in this day and age of syncretistic ecumenism and the rise of the spirit of Antichrist! To truly entrust oneself to Christ and come to the experiential knowledge of Christ is to experience Him as Body of Christ and to enter into the Mystery of the Incarnation of which the Church is the continuation.

In this 10 week course we will survey the great monuments of our Faith IN the Church, i.e. Christ, including the key writings of the Saints, Holy Fathers and Oecumencial Councils.


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