Gregory of Nazianzus

He whom presently you scorn was once transcendent over even you. He who is presently human was incomposite. He remained what he was; what he was not he assumed. No "because" is required for his existence in the beginning, for what could account for the existence of God? But later he came into being because of something, namely, your salvation, yours who insult him and despise his Godhead for that very reason, because he took on your thick corporeality. Through the medium of the mind he had dealings with the flesh, being made that God on earth which is human. Human and God blended; they became a single whole, the stronger side predominating, in order that I might be made God to the same extent that he was made man. He was begotten—yet he was already begotten—of a woman.