How did the Church preserve the correct faith through the ages?

I greatly desired to present a Coptic Orthodox Catechism to reveal our Christian understanding concisely and briefly; particularly because, due to ecclesiastical and political circumstances, our Church was isolated from Western churches in the fifth century A. D. and remained so to a large extent up until the twentieth century, when she was accused by many in the West of adhering to Eutychianism. The Coptic Church, therefore, did not have the opportunity to reveal her true teachings through the writings of her Fathers and her liturgies. Despite the Church’s participation in many international theological conferences in recent years, insisting upon her rejection of Eutychianism, some sources continue to attribute this heresy to our Church, of which the Church is completely innocent and strongly opposes through her liturgies and praises.

In a certain dialogue with the Chalcedonian Orthodox Churches, theologians were surprised to observe that the liturgies and praises that we enjoy to the present day lack even the slightest hint of Eutychianism, but rather, positively oppose it in a beautifully Christian manner; especially the daily Theotokias and those of the festal celebrations. Some of the theologians observed that they harmonize with the thought St. Cyril, or that perhaps he was their author.

A Greek theologian once asked me whether we use the word “Theotokos” to describe St. Mary and was astonished to learn that it is a term beloved in Coptic texts in every age.