Question: The word ‘Trinity’ is not found in Sacred Scripture. Where did it originate?
*To place this question in a time context: the canon of scripture was essentially settled in the 4th century at the Councils of Hippo, Carthage and Rome around A.D. 393. The canon was affirmed once more by the Council of Florence in 1431 and again at the Council of Trent in 1546.*
Here is a rough sketch of some early Christian writers who spearheaded the development of our understanding of the Blessed “Trinity”:
“In Scripture there is as yet no single term by which the Three Divine Persons are denoted together. The word ‘trias’ (of which the Latin trinitas is a translation) is first found in Theophilus of Antioch about A. D.180:
Theophilus spoke of “the Trinity of God [the Father], His Word and His Wisdom” (“Ad. Autol.”, II, 15). The term may, of course, have been in use before his time.
Afterwards “trinity” appears in its Latin form of
trinitas in Tertullian (“De pud.” c. xxi)
Tertullian (160-220 AD)
In the next century, “trinity” is in general use. It is found in many passages of Origen (‘In Ps. xvii’, 15)
The first creed in which it [trinity] appears is that of Origen’s pupil:
(213 -270 AD)
In his ‘Ekthesis tes pisteos’ composed between 260 and 270,
[‘There is therefore nothing created, nothing subject to another in the Trinity: nor is there anything that has been added as though it once had not existed but had entered afterwards: therefore the Father has never been without the Son, nor the Son without the Spirit: and this same Trinity is immutable and unalterable forever.‘”]
And this is just the tip of the iceberg, there’s much more info:
‘From among the apologists we may note Justin, First Apology 6; Athenagoras, A Plea for the Christians 12. The latter tells us that Christians “are conducted to the future life by this one thing alone, that they know God and His Logos, what is the oneness of the Son with the Father, what the communion of the Father with theSon, what is the Spirit, what is the unity of these three, the Spirit, the Son, and the Father, and their distinction in unity.’ ”
From among all the “origens” of the word Trinity, they would all express the “Glory Be” prayer. So beautiful!
“Glory be to the Father, the Son, and the Holy Spirit, as it was in the beginning and ever more shall be, world without end. Amen.”
Peace Be with you!
Ref: http://www.newadvent.org/cathen/15047a.htm“The Blessed Trinity”