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The Battle for the Trinity: Historical Heresies and Church Defences

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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 all.
  • The Son (Jesus Christ): God incarnate, who lived, died, and was resurrected for our salvation.
  • The Holy Spirit: The presence of God active in the world and within believers.

This concept is rooted in Scripture and has been affirmed by the Church through various councils and creeds.

Common Historical Heresies

Arianism

  • What It Taught: Arius, a priest in the early 4th century, claimed that Jesus Christ was not of the same substance as the Father. He taught that the Son was a created being, distinct and subordinate to the Father.
  • Church’s Response: The Council of Nicaea in 325 AD condemned Arianism, affirming that the Son is “of the same substance” (homoousios) as the Father. This is reflected in the Nicene Creed: “We believe in one Lord Jesus Christ, the only Son of God… of one Being with the Father.”
  • Patristic Quote: Athanasius, a staunch defender against Arianism, wrote, “For the Son of God became man so that we might become God” (On the Incarnation, 8:54).

Modalism (Sabellianism)

  • What It Taught: Sabellius proposed that God is one Person who reveals Himself in three different modes or aspects: as the Father in creation, as the Son in redemption, and as the Holy Spirit in sanctification. This denies the distinctiveness of the three Persons.
  • Church’s Response: Modalism was rejected because it undermines the relational aspect of the Trinity. The distinct Persons interact with each other, as seen in Jesus’ baptism where the Father speaks, the Son is baptised, and the Spirit descends like a dove.
  • Patristic Quote: Tertullian argued against Modalism by affirming the distinctiveness within the Godhead: “We do indeed believe that there is only one God, but we believe that under this dispensation… there is the Son, who has issued from the Father, and the Spirit, who has issued from both Father and Son” (Against Praxeas, 2).

Nestorianism

  • What It Taught: Nestorius, a 5th-century bishop, suggested that Jesus Christ was two separate persons — one human and one divine — rather than one Person with two natures.
  • Church’s Response: The Council of Ephesus in 431 AD declared that Jesus is one Person with two distinct yet united natures: divine and human. This ensures that Jesus is fully God and fully man, capable of bridging the gap between humanity and divinity.
  • Patristic Quote: Cyril of Alexandria emphasised the unity of Christ: “Wherefore we confess one Christ, one Son, one Lord. According to this understanding of this unmixed union, we confess the holy Virgin to be Mother of God; because God the Word was incarnate and became Man, and from this conception he united the temple taken from her with himself.” (Cyril of Alexandria Letter to John of Antioch).

Docetism

  • What It Taught: Docetists believed that Jesus’ physical body was an illusion and that He only seemed to suffer and die on the cross.
  • Church’s Response: The Church affirmed that Jesus’ incarnation and suffering were real, as this is essential for our salvation. Jesus’ true humanity allows Him to truly represent us and atone for our sins.
  • Patristic Quote: Ignatius of Antioch stressed the reality of Jesus’ incarnation and suffering: “He was truly of the seed of David according to the flesh, and the Son of God according to the will and power of God; truly born of a virgin… He was truly nailed up in the flesh for our sakes” (Letter to the Smyrnaeans, I).

The Athanasian Creed

Another important aspect of understanding the Trinity is the Athanasian Creed, which dates back to around the 5th century. This creed provides a clear and detailed explanation of the Trinity and the nature of Christ, emphasising the equality and unity of the three Persons of the Trinity while maintaining their distinctiveness.

Key Points of the Athanasian Creed:

  • The Father, Son, and Holy Spirit are each fully God, co-equal and co-eternal.
  • None of the Persons is greater or lesser than the others; they are all almighty and eternal.
  • The three Persons are distinct, yet there is only one God.

This creed is valuable for its thorough articulation of Trinitarian doctrine, helping to guard against misunderstandings and heresies. It affirms, “The Father is God, the Son is God, and the Holy Spirit is God, and yet there are not three Gods, but one God”. Read the creed in full here.

The Monarchical Trinitarian Model

The Monarchical Trinitarian model is an early Christian understanding that emphasises the monarchy (or the sole rule) of God the Father within the Trinity. According to this model:

  • God the Father is the source and origin of the Trinity. The Father begets the Son and breathes forth the Holy Spirit.
  • The Son is eternally begotten of the Father, meaning His origin is from the Father, but this begetting is an eternal reality, not a point in time.
  • The Holy Spirit proceeds from the Father (and, in Western theology, also from the Son [filioque]), emphasising the Spirit’s origin in the Father.

This model highlights the relational structure within the Trinity without compromising the equality and unity of the three Persons. The Father is seen as the “fountainhead” of divinity, but the Son and the Holy Spirit share the same divine essence.

  • Patristic Insight: Gregory of Nyssa wrote, “For when we say that one is caused, and that the other is without cause, we do not divide the nature by the word cause, but only indicate the fact that the Son does not exist without generation, nor the Father by generation” (On Not Three Gods).

Comparing the Athanasian Creed and the Monarchical Model

While both the Athanasian Creed and the Monarchical Trinitarian model affirm the orthodox understanding of the Trinity, they emphasise different aspects of this doctrine:

  • Athanasian Creed: This creed is more focused on the equality and unity of the three Persons. It ensures that none of the Persons is seen as inferior or superior to the others. The creed is a robust defence against any form of subordinationism (the belief that the Son and the Holy Spirit are subordinate to the Father).
  • Monarchical Trinitarian Model: This model, while also affirming the equality and unity of the three Persons, emphasises the Father’s role as the source or origin within the Trinity. It highlights the relational structure, where the Father begets the Son, and the Holy Spirit proceeds from the Father.

In essence, the two are complementary. The Athanasian Creed provides a balanced and comprehensive articulation of Trinitarian doctrine, suitable for guarding against various heresies. The Monarchical Trinitarian model provides a helpful perspective on the relational dynamics within the Godhead, ensuring that while the Persons are co-equal and co-eternal, their relational distinctions are maintained.

Why Understanding These Heresies Matters

Understanding these heresies and the Church’s response helps us appreciate the depth and richness of the doctrine of the Trinity. It guards us against similar errors today and strengthens our ability to articulate and defend our faith. By learning from the past, we ensure that we remain faithful to the truth revealed in Scripture and upheld by the Church through the ages.

In embracing the orthodox teaching of the Trinity, we join with believers throughout history in affirming the mystery and majesty of our triune God. As we recite the creeds and reflect on these truths, let us be encouraged and inspired to live out our faith with greater conviction and clarity and stand firm in the faith handed down to us by the saints.

 


Further Reading

 


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