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The Early Concept of the Trinity: Tracing the Roots

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The doctrine of the Trinity, which asserts the co-equality of the Father, Son, and Holy Spirit, has deep roots in the early Christian writings of the first three centuries. While the full articulation of the Trinity developed over time, culminating at the Council of Nicaea in the fourth century, references to the equality of these three persons can be traced back to influential documents and the teachings of early Church Fathers in the centuries leading up to this pivotal moment in Church History.

Early Church Beliefs and Teachings

One of the earliest Christian documents, the Didache, believed to have been written in the late first or early second century, provides a clear reference to the co-equality of the Father, Son, and Holy Spirit. In chapter 7, it instructs the baptismal formula to be in the name of the Father, Son, and Holy Spirit, emphasising their equal importance and authority in the Christian faith. While this is basically repeating Scripture (Matt 28:19), it demonstrates that the understanding of a 3-fold name of God to baptise in was a common practice in the early Christian communities.

The writings of prominent early Church Fathers further affirm the concept of the Trinity. Clement of Rome, in his First Epistle to the Corinthians, chapter 46, written around AD 96, emphasises the unity in God, Christ, and the Spirit, stating, “Have we not one God and one Christ and one Spirit of grace poured out upon us?”. Clement provides an important link back to the Apostles, too, as Origen of Alexandria (AD 185—284) and Eusebius of Caesarea (AD 260—340) maintained that Clement of Rome was the same Clement mentioned by the apostle Paul in Philippians 4:3. Irenaeus of Lyons (AD 130—200) also tells us that “this man [Clement], as he had seen the blessed apostles, and had been conversant with them, might be said to have the preaching of the apostles still echoing [in his ears], and their traditions before his eyes” (Against Heresies 3:3). So, his letter provides important context when discussing this topic and what apostolic teaching was.

Likewise, Justin Martyr, writing around AD 150, in chapter 13 of his First Apology writes about the triune nature of God, and how Jesus is in “second place” within the Godhead:

Our teacher of these things is Jesus Christ, who also was born for this purpose, and was crucified under Pontius Pilate, procurator of Judæa, in the times of Tiberius Cæsar; and that we reasonably worship Him, having learned that He is the Son of the true God Himself, and holding Him in the second place, and the prophetic Spirit in the third, we will prove. For they proclaim our madness to consist in this, that we give to a crucified man a place second to the unchangeable and eternal God, the Creator of all; for they do not discern the mystery that is herein, to which, as we make it plain to you, we pray you to give heed.

Origen's work "De Principiis" (On First Principles), written around AD 220, also displays an early understanding of the equality of the three Persons within the Godhead. In Book 1, Chapter 3, Section 7 of this work, Origen discusses the equality of the Father, Son, and Holy Spirit within the Trinity:

But there is nothing in the Trinity that can be called greater or less, since the fountain of divinity alone contains all things by His word and reason, and by the Spirit of His mouth sanctifies all things which are worthy of sanctification.

First Use of the Word "Trinity"

The first recorded use of the term "Trinity" is often attributed to the early Christian theologian Tertullian (c. 155 – c. 240 AD) in the Latin form "Trinitas". Tertullian was a prolific writer and is known for his contributions to early Christian theology.

One of the passages where he addresses the concept of the Trinity is from his work "Against Praxeas" (Adversus Praxean). In this treatise, Tertullian defends the distinction between the Father, Son, and Holy Spirit while maintaining the unity of the Godhead. Here is an excerpt from Tertullian's "Against Praxeas":

We define that there are two, the Father and the Son, and three with the Holy Spirit, and this number is made by the pattern of salvation… They are three not in dignity, but in degree, not in substance but in form, not in power but in kind. They are of one substance and power because there is one God from whom these degrees, forms, and kinds devolve in the name of Father, Son, and Holy Spirit.

Ignatius and the Trinity

Jesuit priest, theologian, and scholar Fr. Edmund Fortman provides an analysis of Ignatius’s writings, offering invaluable insights into the understanding of the Trinity during the very early Christian period. Ignatius is another apostolic link as he was a disciple of the Apostle John. Writing between AD 108–110, in his letter to the Ephesians, speaks of God as Father and identifies Him primarily as the ‘Father of Jesus Christ’. Jesus, in Ignatius’s view, is referred to as ‘God’ no less than 14 times, indicating a clear acknowledgment of His divine nature and equality with the Father (Eph. inscr. 1.1, 7.2, 15.3, 17.2, 18.2, 19.3; Trall. 7.1; Rom. inscr. 3.3, 6.3; Smyrn. 1.1; Pdyc. 8.3).

Ignatius delves into the intricate nature of Jesus, describing Him as the Father’s Word (Magn. 8.2), ‘the mind of the Father’ (Eph. 3.3), and ‘the mouth through which the Father truly spoke’ (Rom. 8.2). The complexity of the relationship between the Father and the Son is hinted at when Ignatius declares that Christ is the Father’s ‘thought’ (Eph. 3.2).

Fr. Edmund Fortman’s interpretation provides clarity on Ignatius’s view of Jesus’ divine sonship. While some scholars propose that Ignatius linked Jesus’ divine sonship to the incarnation, Ignatius clearly affirms Jesus’ pre-existence, stating that He ‘from eternity was with the Father and at last appeared to us’ (Magn. 6.1). Moreover, Ignatius emphasises the distinct existence of both ‘our God Jesus Christ’ and the Holy Spirit before Jesus’ birth, suggesting a pre-existing Trinity (Eph. 18.2).

These insights from Ignatius offer a nuanced understanding of the early Christian perception of the Trinity, acknowledging the co-equality of the Father, Son, and Holy Spirit, and hinting at the mysterious relationship between the divine persons.

Conclusion

The seeds of the Trinitarian understanding, emphasising the co-equality of the Father, Son, and Holy Spirit, were sown in the first three centuries of Christian theology. The Didache and the writings of early Church Fathers such as Clement of Rome, Ignatius, Justin Martyr, Tertullian, and Origen, provide evidence of the foundational beliefs that would later be fully articulated in the doctrine of the Trinity. The early Christians grappled with the mystery of the divine nature, setting the stage for the theological developments that followed in the later centuries of Christian thought.

This should hopefully demonstrate that the claims often made by Jehovah's Witnesses, Muslims, and other anti-Trinitarian groups, that the Trinity didn't exist until the fourth century and the Council of Nicaea is completely fabricated. The doctrine is wholly Biblical and Apostolic and has been taught and passed on since the end of the first century.

2 Corinthians 13:13

The grace of the Lord Jesus Christ, the love of God, and the communion of the Holy Spirit be with all of you.

Further Reading

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