The term Trinity is not in the scriptures, but it is a good term. Up to the 4th century the Trinity did not have the 3 in 1 definition.....that was done by the Roman Catholic Church and forced on Christians under penalty of death.
Part of the reason that this topic is confusing and the 3 in 1 false belief has lasted so long is because Yahweh's name was taken out of the Old Testament around 6,800 times and replaced with Lord or God.....So the term God became a name. Several times Yahweh said He was the only God and there was no other like Him and He created everything. And over all I agree with Yahweh on this. But the New Testament seems to say that Yeshua was in the Old Testament and created everything. Again I agree with Yahweh.
But I do agree with Albert Einstein's theory on Gods and time. It is complex but essentially Gods relate to time as in to some extent they exist past, present, and future. In that Yeshua and the Holy Spirit existed in the Old Testament but more as awareness not actually named in the Old Testament or part of events. But with the Holy Spirit not having a name and Father and Son having spirits that are holy, it can get confusing.
Posts 156-162 not counting 159 for details.
Part of the reason that the Trinity doctrine was not "officially" taught until the time of the Council of Nicea is that Christianity was illegal
carm.org
Clement of Rome, AD 95-96
By [Jesus] the Lord has willed that we should taste of immortal knowledge, "who, being the brightness of His majesty, is by so much greater than the angels, as He hath by inheritance obtained a more excellent name than they" [Heb. 1:3-4]. For it is thus written, "Who maketh His angels spirits, and His ministers a flame of fire" [Ps. 104:4; Heb. 1:7]. But concerning His Son the Lord spoke thus: "Thou art my Son, to-day have I begotten Thee. Ask of Me, and I will give Thee the heathen for Thine inheritance, and the uttermost parts of the earth for Thy possession" [Ps. 2:7-8; Heb. 1:5]. (1 Clement 36)
Ignatius of Antioch, AD 110
Our God, Jesus Christ, was, according to the appointment of God, conceived in the womb by Mary, of the seed of David, but by the Holy Spirit. (Letter to the Ephesians 18)
Do ye all come together in common, and individually, through grace, in one faith of God the Father, and of Jesus Christ His only-begotten Son, and the first-born of every creature" [Col. 1:15] but of the seed of David according to the flesh, being under the guidance of the Comforter. (Letter to the Ephesians 20)
Ignatius, who is also called Theophorus, to the Church which has obtained mercy, through the majesty of the Most High Father, and Jesus Christ, His only-begotten Son; the Church which is beloved and enlightened by the will of Him that willeth all things which are according to the love of Jesus Christ our God. (greeting to the Letter to the Romans)
Ignatius … to the church of God the Most High Father and his beloved Son, Jesus Christ, … I glorify God, even Jesus Christ, who has given you such wisdom … (Letter to the Smyrneans intro-ch. 1)
Anonymous, Letter to Diognetus, AD 80 - 130
This is he who was from the beginning, who appeared as if new, and was found old, and yet who is ever born afresh in the hearts of the saints. This is he who, being from everlasting, is today called the Son. (Letter to Diognetus 11)
Justin Martyr, c. AD 150
Jesus Christ is the only proper Son who has been begotten by God, being His Word and first-begotten, and power; and, becoming man according to His will, He taught us these things for the conversion and restoration of the human race. (First Apology 23)
And that God the Father of all would bring Christ to heaven after He had raised Him from the dead, and would keep Him there until He has subdued His enemies the devils, and until the number of those who are foreknown by Him as good and virtuous is complete, on whose account He has still delayed the consummation—hear what was said by the prophet David. These are his words: "The Lord said unto My Lord, Sit Thou at My right hand, until I make Thine enemies Thy footstool. The Lord shall send to Thee the rod of power out of Jerusalem; and rule Thou in the midst of Thine enemies. With Thee is the government in the day of Thy power, in the beauties of Thy saints: from the womb of morning have I begotten Thee" [Ps. 110:1-3, LXX]. (First Apology 45)
For they who are called devils attempt nothing else than to seduce men from God who made them, and from Christ His first-begotten. (First Apology 58)
"No one knows the Father but the Son, nor the Son but the Father, and those to whom the Son will reveal him" [Matt. 21:27]. The Jews, accordingly, being are throughout of the opinion that it was the Father of the universe who spoke to Moses [in the burning bush], though the One who spoke to him was the Son of God. … They are justly charged, both by the Spirit of Prophecy and by Christ himself, with knowing neither the Father nor the Son. Those who affirm that the Son is the Father are proven neither to be acquainted with the Father nor to know that the Father has a Son. The Son, being the first-begotten Word of God, is God. Of old he appeared in the shape of and in the likeness of an angel to Moses and other prophets, but now in the time of your reign [i.e., during the Roman empire] … he became man by a virgin … for the salvation of those who believe in him. (First Apology 63).
There is then brought to the president of the brethren [I think this refers to whoever is presiding at a meeting, but no one knows for certain] bread and a cup of wine mixed with water. He takes them, gives praise and glory to the Father of the universe through the name of the Son and of the Holy Spirit, and offers thanks at considerable length for our being counted worthy to receive these things at his hands. (First Apology 65)
Leningrad Codex of the Hebrew Scriptures
Leningrad Codex of the Hebrew Scriptures
For all things with which we are supplied, we bless the Maker of all through his Son Jesus Christ and through the Holy Spirit. (First Apology 67)
But to the Father of all, who is unbegotten, there is no name given. .. And His Son, who alone is properly called Son, the Word who also was with him and was begotten before the works, when at first He created and arranged all things by Him, is called Christ, in reference to His being anointed and Godís ordering all things through him. (Second Apology 6)
Our Saviour Jesus Christ … being the Word of God, inseparable from Him in power, having assumed [the form of] man, who had been made in the image and likeness of God, restored to us the knowledge of the religion of our ancient forefathers. (Hortatory Address to the Greeks 38)
Permit me first to recount the prophecies, which I wish to do in order to prove that Christ is called both God and Lord of hosts and Jacob in parable by the Holy Spirit. (Dialogue with Trypho 36)
[Trypho the Jew speaking to Justin about Christians in general] Trypho said, " … You utter many blasphemies. You're attempting to persuade us that this crucified man was with Moses and Aaron, spoke to them in the pillar of the cloud, became crucified, ascended up to heaven, will come again to earth, and ought to be worshiped!"
Then I answered, "I know that, as the word of God says, this great wisdom of God, the Maker of all things, and the Almighty, is hidden from you." (Dialogue with Trypho 38)
In the fourty-fourth Psalm [LXX, in our Masoretic text, it's the 45th], these words are … referred to Christ: "My heart has brought forth a good Word" [v. 1, considered by the early Christians to be a reference to the birth of the Son/Word in eternity past]. (Dialogue with Trypho 38)
Powerful or fascinating Trinity quotes from throughout Christian history.
www.christian-history.org