Early Christian Quotes on the Trinity
Secret Book of James (Early to Mid-2nd Century):
[Jesus speaking] "Therefore, trust in me, my brethren; understand what the great light is. The Father has no need of me, - for a father does not need a son, but it is the son who needs the father - though I go to him. For the Father of the Son has no need of you."
Odes of Solomon (1st or 2nd Century) 19:1-2:
A cup of milk was offered to me, and I drank it in the sweetness of the Lord's kindness.
The Son is the cup, and the Father is He who was milked; and the Holy Spirit is She who milked Him;
Justin Martyr’s Dialog with Trypho (Mid-2nd Century) Chapter 61:
God begat before all creatures a Beginning,[who was] a certain rational power[proceeding] from Himself, who is called by the Holy Spirit, now the Glory of the Lord, now the Son, again Wisdom, again an Angel, then God, and then Lord and Logos; and on another occasion He calls Himself Captain, when He appeared in human form to Joshua the son of Nave(Nun). For He can be called by all those names, since He ministers to the Father's will, and since He was begotten of the Father by an act of will; just as we see happening among ourselves: for when we give out some word, we beget the word; yet not by abscission, so as to lessen the word[which remains] in us, when we give it out: and just as we see also happening in the case of a fire, which is not lessened when it has kindled[another], but remains the same; and that which has been kindled by it likewise appears to exist by itself, not diminishing that from which it was kindled.
Justin Martyr’s Dialog with Trypho (Mid-2nd Century) Chapter 65:
'Thus saith the Lord…I have given Thee for a covenant of the people, for a light of the Gentiles…I am the Lord God; this is my name: my glory will I not give to another, nor my virtues to graven images. Behold, the former things are come to pass; new things which I announce, and before they are announced they are made manifest to you.…" And when I repeated this, I said to them, "Have you perceived, my friends, that God says He will give Him whom He has established as a light of the Gentiles, glory, and to no other; and not, as Trypho said, that God was retaining the glory to Himself?"
Hippolytus’ Against the Heresy of One Noetus (Early 3rd Century), Paragraph 11:
And thus there appeared another beside Himself. But when I say another, I do not mean that there are two Gods, but that it is only as light of light, or as water from a fountain, or as a ray from the sun. For there is but one power, which is from the All; and the Father is the All, from whom cometh this Power, the Word. And this is the mind which came forth into the world, and was manifested as the Son of God. All things, then, are by Him, and He alone is of the Father.
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Find more of what the early Christians thought on my Christian History page!