The Trinity and Divine Unity Explained in Christian Theology
Christian theology affirms both the unity of God and the distinctness of three divine Persons, a doctrine commonly referred to as the Trinity [1, 7]. While the term "Trinity" itself does not appear in Scripture, it is derived from the Greek trias, first used by Theophilus (c. 168-183 AD), and the Latin trinitas, first used by Tertullian (c. 220 AD), to articulate this concept [1].
The core propositions of the doctrine are that God is one, and there is only one God, as stated in Deuteronomy 6:4, Mark 12:29, and Isaiah 44:6 [1, 2]. This divine unity is a foundational truth, asserted by God himself, Christ, Moses, and the apostles [2]. For instance, Paul writes in 1 Timothy 2:5, "For there is one God, and one mediator between God and men, the man Christ Jesus" [2].
Despite this emphasis on unity, Christian theology also teaches that the Father, the Son (Jesus Christ), and the Holy Spirit are distinct divine Persons [1, 6]. The Athanasian Creed, an ecumenical statement from the 5th-6th century AD, articulates this by stating, "we worship one God in Trinity, and Trinity in Unity; neither confounding the persons nor dividing the substance" [7]. It further clarifies that "there is one person of the Father, another of the Son, and another of the Holy Spirit," yet "the Godhead of the Father, of the Son, and of the Holy Spirit is all one, the glory equal, the majesty coeternal" [7].
The distinct personality of the Holy Spirit is evidenced by attributes like intelligence and volition ascribed to him (John 14:17, 26; 1 Corinthians 2:10-11), and his execution of personal offices such as reproving, helping, glorifying, and interceding (John 16:7-13; Romans 8:26) [3]. Similarly, the divinity of Christ is affirmed, with passages like John 10:30 emphasizing his unity with the Father [2, 4].
The Augsburg Confession, a Lutheran confessional document from 1530, similarly affirms the Nicene Council's decree concerning "the Unity of the Divine Essence and concerning the Three Persons," stating that "there is one Divine Essence which is called and which is God... and yet there are three Persons, of the same essence and power" [8]. The benediction in 2 Corinthians 13:14, which mentions "The grace of the Lord Jesus Christ, and the love of God, and the communion of the Holy Spirit," is seen by some as proving the doctrine of the Divine Trinity in unity, with the varying order of Persons indicating their co-equality [5, 9]. Charles Hodge, one theologian, describes the "threefold personality of the Godhead" as the Father, Son, and Spirit being "distinct persons, the same in substance and equal in power and glory" [6].
Sources
- Easton's Bible Dictionary “Easton's Bible Dictionary: Trinity — A word not found in Scripture, but used to express the doctrine of the unity of God as subsisting in three distinct Persons. This word is derived from the Gr. trias, first used by Theophilus (A.D. 168-183), or from the Lat. trinitas, first used by Tertullian (A.D. 220), to express this doctrine. The propositions involved in the doctrine are these: 1. That God is one, and that there is but one God (Deut. 6:4; 1 Kings 8:60; Isa. 44:6; Mark 12:29, 32; John 10:30). 2. That the Father is a distinct divine Person (hypostasis, subsistentia, persona, suppositum int”
- Torrey's Topical Textbook “Torrey's Topical Textbook: Unity of God — A ground for obeying him exclusively -- De 4:39,40. A ground for loving him supremely -- De 6:4,5; Mr 12:29,30. Asserted by God himself. -- Isa 44:6,8; 45:18,21. Christ. -- Mr 12:29; Joh 17:3. Moses. -- De 4:39; 6:4. Apostles. -- 1Co 8:4,6; Eph 4:6; 1Ti 2:5. Consistent with the deity of Christ and of the Holy Spirit -- Joh 10:30; 1Jo 5:7; Joh 14:9-11. Exhibited in His greatness and wonderful works. -- 2Sa 7:22; Ps 86:10. His works of creation and providence. -- Isa 44:24; 45:5-8. His being alone possessed of fore-knowledge. -- Isa 46:9-11. His exercise”
- Easton's Bible Dictionary “Easton's Bible Dictionary: Holy Ghost — The third Person of the adorable Trinity. His personality is proved (1) from the fact that the attributes of personality, as intelligence and volition, are ascribed to him (John 14:17, 26; 15:26; 1 Cor. 2:10, 11; 12:11). He reproves, helps, glorifies, intercedes (John 16:7-13; Rom. 8:26). (2) He executes the offices peculiar only to a person. The very nature of these offices involves personal distinction (Luke 12:12; Acts 5:32; 15:28; 16:6; 28:25; 1 Cor. 2:13; Heb. 2:4; 3:7; 2 Pet. 1:21). His divinity is established (1) from the fact that the names of Go”
- Torrey's Topical Textbook “Torrey's Topical Textbook: Excellency and Glory of Christ, The — As God -- Joh 1:1-5; Php 2:6,9,10. As the Son of God -- Mt 3:17; Heb 1:6,8. As one with the Father -- Joh 10:30,38. As the First-born -- Col 1:15,18. As the First-begotten -- Heb 1:6. As Lord of lords, &c -- Re 17:14. As the image of God -- Col 1:15; Heb 1:3. As creator -- Joh 1:3; Col 1:16; Heb 1:2. As the Blessed of God -- Ps 45:2. As Mediator -- 1Ti 2:5; Heb 8:6. As Prophet -- De 18:15,16; Ac 3:22. As Priest -- Ps 110:4; Heb 4:15. As King -- Isa 6:1-5; Joh 12:41. As Judge -- Mt 16:27; 25:31,33. As Shepherd -- Isa 40:10,11; Joh”
- 2 Corinthians (Presbyterian) “Jamieson, Fausset & Brown on 2 Corinthians 13:14: The benediction which proves the doctrine of the Divine Trinity in unity. "The grace of Christ" comes first, for it is only by it we come to "the love of God" the Father (Joh 14:6). The variety in the order of Persons proves that "in this Trinity none is afore or after other" [Athanasian Creed]. communion--joint fellowship, or participation, in the same Holy Ghost, which joins in one catholic Church, His temple, both Jews and Gentiles. Whoever has "the fellowship of the Holy Ghost," has also "the grace of our Lord Jesus Christ," and "the love”
- CCEL (Reformed (Old Princeton)) “Charles Hodge, Systematic Theology, Vol. 1, section 14: § 4. Christian Theology . As science, concerned with the facts of nature, has its several departments, as Mathematics, Chemistry, Astronomy, etc., so Theology 32 having the facts of Scripture for its subject, has its distinct and natural departments. First — Theology Proper, Which includes all the Bible teaches of the being and attributes of God; of the threefold personality of the Godhead, or, that the Father, Son, and Spirit are distinct persons, the same in substance and equal in power and glory; the relation of God to the world, or, h”
- Athanasian Creed (Ecumenical) “Athanasian Creed (Ecumenical, c. 5th-6th century AD), Section 2: And the catholic faith is this: That we worship one God in Trinity, and Trinity in Unity; neither confounding the persons nor dividing the substance. For there is one person of the Father, another of the Son, and another of the Holy Spirit. But the Godhead of the Father, of the Son, and of the Holy Spirit is all one, the glory equal, the majesty coeternal. Such as the Father is, such is the Son, and such is the Holy Spirit. The Father uncreated, the Son uncreated, and the Holy Spirit uncreated. The Father incomprehensible, the So”
- Augsburg Confession (Lutheran) “Augsburg Confession (Lutheran, 1530), 1 Our Churches, with common consent, do teach that the decree: 1 Our Churches, with common consent, do teach that the decree of the Council of Nicaea concerning the Unity of the Divine Essence and concerning the Three Persons, is true and to be believed without any doubting; 2 that is to say, there is one Divine Essence which is called and which is God: eternal, without body, without parts, of infinite power, wisdom, and goodness, the Maker and Preserver of all things, visible and invisible; and 3 yet there are three Persons, of the same essence and power,”
- 2 Corinthians (Protestant academic) “Tyndale House on 2 Corinthians 13:14: 13:14 Paul closes his letter with a prayer and blessing. He invokes the three persons of the Trinity, with the grace of the Lord Jesus Christ (see 8:9) coming first. This is because we are always relying on Christ’s sacrificial love, which reconciles us to God the Father (5:18-21) and unites us through the fellowship of the Holy Spirit with all our fellow believers. • The love of God provides for our needs and graciously restores us to his family. • The fellowship of the Holy Spirit means our fellowship with the Spirit, who joins Christians together into a”