God manifested in human form

Hence every kind of magic was destroyed, and every bond of wickedness disappeared; ignorance was removed, and the old kingdom abolished, God Himself being manifested in human form for the renewal of eternal life. And now that took a beginning which had been prepared by God. Henceforth all things were in a state of tumult, because He mediated the abolition of death.

Ignatius of Antioch
Epistle to the Ephesians
Chapter XIX

Begotten before time

For the Son of God, who was begotten before time began, and established all things according to the will of the Father, He was conceived in the womb of Mary, according to the appointment of God, of the seed of David and by the Holy Spirit.

Ignatius of Antioch
Epistle to the Ephesians
Chapter XVIII

Our God Jesus Christ was conceived

For 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. He was born and baptized, that by His passion He might purify the water.

Ignatius of Antioch
Epistle to the Ephesians
Chapter XVIII

He is in us as God

Let us therefore do all things as those who have Him dwelling in us, that we may be His temples, and He may be in us as God. Let Christ speak in us, even as He did in Paul. Let the Holy Spirit teach us to speak the things of Christ in like manner as He did.

Ignatius of Antioch
Epistle to the Ephesians
Chapter XV

Trinitarian Illustration

…being stones of the temple of the Father, prepared for the building of God the Father, and drawn up on high by the instrument of Jesus Christ, which is the cross, making use of the Holy Spirit as a rope, while your faith was the means by which you ascended, and your love the way which led up to God.

Ignatius of Antioch
Epistle to the Ephesians
Chapter IX

Jesus — the only true God

But our Physician is the only true God, the unbegotten and unapproachable, the Lord of all, the Father and Begetter of the only-begotten Son. We have also as a Physician the Lord our God, Jesus the Christ, the only-begotten Son and Word, before time began, but who afterwards became also man, of Mary the virgin. For “the Word was made flesh.” Being incorporeal, He was in the body; being impassible, He was in a passible body; being immortal, He was in a mortal body; being life, He became subject to corruption, that He might free our souls from death and corruption, and heal them, and might restore them to health, when they were diseased with ungodliness and wicked lusts.

Ignatius of Antioch
Epistle to the Ephesians
Chapter VII