Why Jesus Became Human

“The Word of God, our Lord Jesus Christ, who did, through His transcendent love, become what we are, that He might bring us to be even what He is Himself.”
Irenaeus, Against Heresies

“The Word of God became man, that thou mayest learn from man how man may become God.”
Clement of Alexandria, Exhortation to the Heathen

“God became man so that man might become God.”
Athanasius, On the Incarnation