Shepherd of Hermas, 80 A.D:
“The Son of God is older than all his creation, so that he became the Father’s adviser in his creation. Therefore also he is ancient” (The Shepherd 12).
Barnabus 70 A.D. disciple of Paul:
“And further, my brethren, if the Lord [Jesus] endured to suffer for our soul, he being the Lord of all the world, to whom God said at the foundation of the world, ‘Let us make man after our image, and after our likeness,’ understand how it was that he endured to suffer at the hand of men” (Letter of Barnabas 5).
The Didache 50 A.D:
And concerning baptism, baptize this way: Having first said all these things, baptize into the name of the Father, and of the Son, and of the Holy Spirit, in living water. But if you have no living water, baptize into other water; and if you cannot do so in cold water, do so in warm. But if you have neither, pour out water three times upon the head into the name of Father and Son and Holy Spirit. But before the baptism let the baptizer fast, and the baptized, and whoever else can; but you shall order the baptized to fast one or two days before.
Polycarp 70-155 A.D Bishop of Smyrna. Disciple of John the Apostle:
“O Lord God almighty . . . I bless you and glorify you through the eternal and heavenly high priest Jesus Christ, your beloved Son, through whom be glory to you, with Him and the Holy Spirit, both now and forever”
Ignatius 30–107 A.D disciple of John:
Since, also, there is but one unbegotten Being, God, even the Father; and one only-begotten Son, God, the Word and man; and one Comforter, the Spirit of truth; and also one preaching, and one faith, and one baptism;
If any one says there is one God, and also confesses Christ Jesus, but thinks the Lord to be a mere man, and not the only-begotten God, and Wisdom, and the Word of God, and deems Him to consist merely of a soul and body, such an one is a serpent, that preaches deceit and error for the destruction of men. And such a man is poor in understanding, even as by name he is an Ebionite. -ibid, to the Philadelphians Chapter VI
For if there is one God of the universe, the Father of Christ, “of whom are all things;” and one Lord Jesus Christ, our [Lord], “by whom are all things;” and also one Holy Spirit, who wrought in Moses, and in the prophets and apostles;
If any one confesses the Father, and the Son, and the Holy Ghost, and praises the creation, but calls the incarnation merely an appearance, and is ashamed of the passion, such an one has denied the faith, not less than the Jews who killed Christ. If any one confesses these things, and that God the Word did dwell in a human body, being within it as the Word, even as the soul also is in the body, because it was God that inhabited it, and not a human soul, but affirms that unlawful unions are a good thing, and places the highest happiness in pleasure, as does the man who is falsely called a Nicolaitan, this person can neither be a lover of God, nor a lover of Christ, but is a corrupter of his own flesh, and therefore void of the Holy Spirit, and a stranger to Christ. – Ignatius to the Philadelphians Chapter VI
Mathetes 160 A.D:
“[The Father] sent the Word that he might be manifested to the world . . . This is he who was from the beginning, who appeared as if new, and was found old . . . This is he who, being from everlasting, is today called the Son” (Letter to Diognetus 11).
Tatian the Syrian 170 A.D:
“We are not playing the fool, you Greeks, nor do we talk nonsense, when we report that God was born in the form of a man” (Address to the Greeks 21).
Athenagoras 177 A.D:
“The Son of God is the Word of the Father in thought and actuality. By him and through him all things were made, the Father and the Son being one. Since the Son is in the Father and the Father is in the Son by the unity and power of the Spirit, the Mind and Word of the Father is the Son of God. And if, in your exceedingly great wisdom, it occurs to you to inquire what is meant by `the Son,’ I will tell you briefly: He is the first- begotten of the Father, not as having been produced, for from the beginning God had the Word in himself, God being eternal mind and eternally rational, but as coming forth to be the model and energizing force of all material things” (Plea for the Christians 10:2-4).
Melito of Sardis 177 A.D:
“It is no way necessary in dealing with persons of intelligence to adduce the actions of Christ after his baptism as proof that his soul and his body, his human nature, were like ours, real and not phantasmal. The activities of Christ after his baptism, and especially his miracles, gave indication and assurance to the world of the deity hidden in his flesh. Being God and likewise perfect man, he gave positive indications of his two natures: of his deity, by the miracles during the three years following after his baptism, of his humanity, in the thirty years which came before his baptism, during which, by reason of his condition according to the flesh, he concealed the signs of his deity, although he was the true God existing before the ages” (Fragment in Anastasius of Sinai’s The Guide 13).
Theophilus of Antioch 180 A.D:
“On the fourth day the luminaries were made; because God, who possesses foreknowledge, knew the follies of the vain philosophers, that they were going to say, that the things which grow on the earth are produced from the heavenly bodies, so as to exclude God. In order, therefore, that the truth might be obvious, the plants and seeds were produced prior to the heavenly bodies, for what is posterior cannot produce that which is prior. And these contain the pattern and type of a great mystery. For the sun is a type of God, and the moon of man. And as the sun far surpasses the moon in power and glory, so far does God surpass man. And as the sun remains ever full, never becoming less, so does God always abide perfect, being full of all power, and understanding, and wisdom, and immortality, and all good. But the moon wanes monthly, and in a manner dies, being a type of man; then it is born again, and is crescent, for a pattern of the future resurrection. In like manner also the three days which were before the luminaries, are types of the Trinity,. of God, and His Word, and His wisdom.”
“And the fourth is the type of man, who needs light, that so there may be God, the Word, wisdom, man. Wherefore also on the fourth day the lights were made. The disposition of the stars, too, contains a type of the arrangement and order of the righteous and pious, and of those who keep the law and commandments of God. For the brilliant and bright stars are an imitation of the prophets, and therefore they remain fixed, not declining, nor passing from place to place. And those which hold the second place in brightness, are types of the people of the righteous. And those, again, which change their position, and flee from place to place, which also are cared planets, they too are a type of the men who have wandered from God, abandoning His law and commandments.” (180 AD, Theophilus of Antioch Chapter XV. – Of the Fourth Day, To Autolycus 2:15)
Aristides, 140 A.D:
“[Christians] are they who, above every people of the Earth, have found the truth, for they acknowledge God, the creator and maker of all things, in the only-begotten Son and in the Holy Spirit” (Apology 16).
Origen 185–254 A.D:
From all which we learn that the person of the Holy Spirit was of such authority and dignity, that saving baptism was not complete except by the authority of the most excellent Trinity of them all, i.e., by the naming of Father, Son, and Holy Spirit, and by joining to the unbegotten God the Father, and to His only-begotten Son, the name also of the Holy Spirit.
Clement of Alexandria 150-215 A.D:
Now, O you, my children, our Instructor is like His Father God, whose son He is, sinless, blameless, and with a soul devoid of passion; God in the form of man, stainless, the minister of His Father’s will, the Word who is God, who is in the Father, who is at the Father’s right hand, and with the form of God is God. He is to us a spotless image; to Him we are to try with all our might to assimilate our souls. – The Instructor. Book I Chapter I
Cyprian 200–258 A.D:
Finally, when, after the resurrection, the apostles are sent by the Lord to the heathens, they are bidden to baptize the Gentiles “in the name of the Father, and of the Son, and of the Holy Ghost.” How, then, do some say, that a Gentile baptized without, outside the Church, yea, and in opposition to the Church, so that it be only in the name of Jesus Christ, everywhere, and in whatever manner, can obtain remission of sin, when Christ Himself commands the heathen to be baptized in the full and united Trinity? – Epistle LXXII.5.18
see also Trinity -JESUS IS THE WORD OF GOD, in Church Father Quotes by Topic