Jesus spoke through the prophets

But when you hear the utterances of the prophets spoken as it were personally, you must not suppose that they are spoken by the inspired themselves, but by the Divine Word who moves them. For sometimes He declares things that are to come to pass, in the manner of one who foretells the future; sometimes He speaks as from the person of God the Lord and Father of all; sometimes as from the person of Christ; sometimes as from the person of the people answering the Lord or His Father, just as you can see even in your own writers, one man being the writer of the whole, but introducing the persons who converse.

Justin Martyr
First Apology
Chapter XXXVI

Christ and the Spirit are worshipped

Our teacher of these things is Jesus Christ, who also was born for this purpose, and was crucified under Pontius Pilate, procurator of Judæa, in the times of Tiberius Cæsar; and that we reasonably worship Him, having learned that He is the Son of the true God Himself, and holding Him in the second place, and the prophetic Spirit in the third, we will prove.

Justin Martyr
First Apology
Chapter XIII

God created matter and has no personal name

And we have been taught, and are convinced, and do believe, that He accepts those only who imitate the excellences which reside in Him, temperance, and justice, and philanthropy, and as many virtues as are peculiar to a God who is called by no proper name. And we have been taught that He in the beginning did of His goodness, for man’s sake, create all things out of unformed matter; and if men by their works show themselves worthy of this His design, they are deemed worthy, and so we have received—of reigning in company with Him, being delivered from corruption and suffering.

Justin Martyr
First Apology
Chapter X

Father, Son and Spirit are worshiped and adored

But both Him, and the Son who came forth from Him and taught us these things, and the host of the other good angels who follow and are made like to Him, and the prophetic Spirit, we worship and adore, knowing them in reason and truth, and declaring without grudging to every one who wishes to learn, as we have been taught.

Justin Martyr
First Apology
Chapter VI

He was to be manifested in flesh

He says in another prophet, “Behold, saith the Lord, I will take away from these, that is, from those whom the Spirit of the Lord foresaw, their stony hearts, and I will put hearts of flesh within them,” because He was to be manifested in flesh, and to sojourn among us.

Epistle of Barnabus
Chapter VI

He who is above all time became visible

Look for Him who is above all time, eternal and invisible, yet who became visible for our sakes; impalpable and impassible, yet who became passible on our account; and who in every kind of way suffered for our sakes. Let not those who seem

Ignatius of Antioch
Epistle to Polycarp
Chapter III