For Historical Understanding

The Heretics & Heresies

Understanding the heresies that the Church Fathers combated is essential to appreciating the development of orthodox doctrine. These teachings were rejected because they undermined core truths about God, Christ, salvation, and the Church.

Why Study Heresies?

St. Augustine wrote, "There are many things which belong to the Catholic faith that, when they are agitated by the feverish restlessness of heretics, in order that they may be defended against them, are both more carefully considered, and more clearly understood, and more earnestly pressed upon the attention." Heresy forced the Church to clarify what it believed and why—producing the great creeds and theological definitions that have guided Christians ever since.

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