Romans 1:4 - Who was designated the Son of God in power according to the Spirit of holiness out of the resurrection of the dead, Jesus Christ our Lord;
Footnote 1 - (Designated) Or, marked out. Before His incarnation Christ, the divine One, already was the Son of God (John 1:18; Rom. 8:3). By incarnation He put on an element, the human flesh, which had nothing to do with divinity; that part of Him needed to be sanctified and uplifted by passing through death and resurrection. By resurrection His human nature was sanctified, uplifted, and transformed. Hence, by resurrection He was designated the Son of God with His humanity (Acts 13:33; Heb. 1:5). His resurrection was His designation. Now, as the Son of God, He possesses humanity as well as divinity. By incarnation He brought God into man; by resurrection He brought man into God, that is, He brought His humanity into the divine sonship. In this way the only begotten Son of God was made the firstborn Son of God, possessing both divinity and humanity. God is using such a Christ, the firstborn Son, who possesses both divinity and humanity, as the producer and as the prototype, the model, to produce His many sons (8:29-30) — we who have believed in and received His Son. We too will be designated and revealed as the sons of God, as He was in the glory of His resurrection (8:19, 21), and with Him we will express God.