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The Battle for the Trinity: Historical Heresies and Church Defences

The Trinity is a cornerstone of Christian faith, defining God as one Being in three Persons: Father, Son, and Holy Spirit. However, throughout history, various misunderstandings and false teachings — known as heresies — have arisen, challenging this core doctrine. Understanding these heresies can strengthen our faith and deepen our appreciation for the truths held by the Church since its earliest days. What Is the Trinity? Before diving into the heresies, let’s briefly review what we mean by the Trinity. The Christian doctrine of the Trinity teaches that God is one essence in three distinct Persons: The Father: The Creator and sustainer of al...

Lent Day 40: Leo the Great: Sermon LXXII: ON THE LORD'S RESURRECTION, II

Day Forty: St. Leo the Great: Sermon LXXII: ON THE LORD'S RESURRECTION, II Who: Leo the Great, also known as Pope St. Leo I (the Great), was Pope from 440-61 AD. Place and date of birth unknown; died 10 November, 461. Leo's pontificate, next to that of St. Gregory I, is the most significant and important in Christian antiquity, as he tried to  combat the heresies which seriously threatened church unity even in the West, such as Pelagianism. What: A sermon on the Gospel, incarnation and resurrection of our Lord. Why: To encourage the Church in the power of the incarnation and the true faith and the nature of Christ and to give a new meaning to Passover in lig...

Did the Early Church invent the Trinity?

...and three godheads. . . . [Some heretics] proclaim that there are in some way three gods, when they divide the sacred unity into three substances foreign to each other and completely separate” — Letter to Dionysius of Alexandria 1, A.D. 262. Therefore, the divine Trinity must be gathered up and brought together in one, a summit, as it were, I mean the omnipotent God of the universe. . . . It is blasphemy, then, and not a common one but the worst, to say that the Son is in any way a handiwork [creature]. … But if the Son came into being [was created], there was a time when these attributes did not exist; and, consequently, there was a time when...

On the Feast of the Nativity, a sermon by Leo the Great

...In the days leading up to Christmas, I wanted to share a sermon from a man known as Leo the Great (aka Pope Leo I), who was a Pope from 440-61 AD. He was one of the most significant and important men in Christian antiquity, as he tried to combat the heresies which seriously threatened church unity in the West, such as Pelagianism. This sermon of his about the incarnation of Christ and what it means for us has always stuck with me since I first read it last April when writing my own book on the Early Church Fathers. It's not that long, so take the time to read it through and let the words sink in as we prepare for Christmas to remember and celebrate the birth...