Severus of Antioch — on 1Pet 4:1 (CATENA)

“By proclaiming that he would suffer and die in the flesh, Christ was indicating that he was passible in his flesh but impassible in his divinity. The ineffable union of the two natures did not cut him in two, for he remains one Lord, one Christ and one Son, one person and one hypostasis, that of the Word incarnate. By becoming man he became capable of suffering and death, but in the divine nature which he had from eternity he remained impassible and consubstantial with the Father and the Son. But insofar as he was consubstantial with us also, he was able to partake of our sufferings and did so willingly and in truth.”