The document called 1 Clement, a letter from the Roman congregation to that at Corinth uses the language of the biblical book of Hebrews to portray Jesus as the reflection of God's splendor,
the "mirror" of "God's... transcendent face" (1 Clement 36) and the "scepter of God's majesty" (1 Clement 16.2). A somewhat later writing from Rome, The Shepherd of Hermas, combines the idea of "the holy pre-existent Spirit which created the whole creation" (Similitudes 5.6) with the picture of Jesus as the suffering and exalted servant.
http://www.theologywebsite.com/history/christologies.shtml
"1Clem 35:11
Now understand ye these things, ye that forget God, lest at any
time He seize you as a lion, and there be none to deliver.
1Clem 35:12
The sacrifice of praise shall glorify Me, and there is the way
wherein I will show him the salvation of God.
1Clem 36:1
This is the way, dearly beloved, wherein we found our salvation,
even Jesus Christ the High priest of our offerings, the Guardian and
Helper of our weakness.
1Clem 36:2
Through Him let us look steadfastly unto the heights of the heavens;
through Him we behold as in a mirror His faultless and most excellent
visage; through Him the eyes of our hearts were opened; through Him
our foolish and darkened mind springeth up unto the light; through
Him the Master willed that we should taste of the immortal knowledge
Who being the brightness of His majesty is so much greater than
angels, as He hath inherited a more excellent name."
First Clement: Clement of Rome
Also:
the great theologian Origen (185-254 C.E.), citing the Book of Wisdom, called Christ 'the spotless mirror' of God's workings (Origen, On First Principles 26).
http://www.ts.mu.edu/readers/content/pdf/60/60.4/60.4.5.pdf
Also:
"and we all, with unvailed face, the glory of the Lord
beholding in a mirror, to the same image are being transformed, from glory to glory, even as by the Spirit of the Lord." 2 cori 3-18
Also:
"For now we see only
a reflection as in a mirror; then we shall see face to face. Now I know in part; then I shall know fully, even as I am fully known." 1 Cor. 13:22
So, Jesus who was like a Mirror, showing the image of God, but as Paul alluded, at the end we see God face to face. This is similar to what Augustine said.
The point from all the above is, the early Christians explained the relation between The Father and Jesus, as a Light of Wisdom and Knowledge that is reflected in a Mirror (The Christ).