page_title: Trinity
section_title: Old Testament parallels
hierarchical_section_title: Trinity / Biblical background / Old Testament parallels
context_page_description: The Christian doctrine of the Trinity holds that God is one God, but three coeternal consubstantial persons or hypostases—the Father, the Son, and the Holy Spirit—as "one God in three Divine persons". The three persons are distinct, yet are one "substance, essence or nature". In this context, a "nature" is what one is, whereas a "person" is who one is. The subset of Christianity that accepts this doctrine is collectively known as Trinitarianism, while the subset that does not is referred to as nontrinitarian. Trinitarianism contrasts with positions such as Binitarianism and Monarchianism, of which Modalistic Monarchianism and Unitarianism are subsets.
  While the developed doctrine of the Trinity is not explicit in the books that constitute the New Testament, the New Testament possesses a "triadic" understanding of God and contains a number of Trinitarian formulas. The doctrine of the Trinity was first formulated among the fathers of the Church as early Christians attempted to rationalize the relationship between Jesus and God in their scriptural documents and prior traditions.
context_section_description: In addition, the Old Testament has also been interpreted as foreshadowing the Trinity, by referring to God's word (Psalm 33:16), his spirit (Isaiah 61:1), and Wisdom (Proverbs 9:1), as well as narratives such as the appearance of the three men to Abraham. However, it is generally agreed among Trinitarian Christian scholars that it would go beyond the intention and spirit of the Old Testament to correlate these notions directly with later Trinitarian doctrine.
  Some Church Fathers believed that a knowledge of the mystery was granted to the prophets and saints of the Old Testament, and that they identified the divine messenger of Genesis 16:7, Genesis 21:17, Genesis 31:11, Exodus 3:2 and Wisdom of the sapiential books with the Son, and "the spirit of the Lord" with the Holy Spirit. Other Church Fathers, such as Gregory Nazianzen, argued in his Orations that the revelation was gradual, claiming that the Father was proclaimed in the Old Testament openly, but the Son only obscurely, because "it was not safe, when the Godhead of the Father was not yet acknowledged, plainly to proclaim the Son".
  Genesis 18–19 has been interpreted by Christians as a Trinitarian text. The narrative has the Lord appearing to Abraham, who was visited by three men (Gen 18:1-2). Then in Genesis 19, "the two angels" visited Lot at Sodom. The interplay between Abraham on the one hand and the Lord/three men/the two angels on the other was an intriguing text for those who believed in a single God in three persons. Justin Martyr, and John Calvin similarly, interpreted it such that Abraham was visited by God, who was accompanied by two angels. Justin supposed that the God who visited Abraham was distinguishable from the God who remains in the heavens, but was nevertheless identified as the (monotheistic) God. Justin appropriated the God who visited Abraham to Jesus, the second person of the Trinity.
  Augustine, in contrast, held that the three visitors to Abraham were the three persons of the Trinity. He saw no indication that the visitors were unequal, as would be the case in Justin's reading. Then in Genesis 19, two of the visitors were addressed by Lot in the singular: "Lot said to them, 'Not so, my lord'" (Gen. 19:18) Augustine saw that Lot could address them as one because they had a single substance, despite the plurality of persons.
  Some Christians interpret the theophanies or appearances of the Angel of the Lord as revelations of a person distinct from God, who is nonetheless called God. This interpretation is found in Christianity as early as Justin Martyr and Melito of Sardis, and reflects ideas that were already present in Philo. The Old Testament theophanies were thus seen as Christophanies, each a "preincarnate appearance of the Messiah".
caption: Russian icon of the Old Testament Trinity by Andrey Rublev, between 1408 and 1425
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