And declared to be the Son of God with power, according to the Spirit of holiness, by the resurrection from the dead:
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Augustine of Hippo
AD 430
Jesus was predestined, so that he who was to be the Son of David according to the flesh should nonetheless be in power the Son of God, according to the Spirit of sanctification, for he was born of the Holy Spirit and the Virgin Mary. This is that unique act, performed in an ineffable manner, the assumption of a man by the Word of God, so that he might truly and properly be called at once the Son of God and the Son of Man—the Son of Man because of the man who was assumed, the Son of God because of the only begotten God who assumed him.