Clement of Alexandria — on 1Pet 3:18 (From the Latin Translation of Cassiodorus)

“"For Christ," he says, "hath once suffered for our sins, the just for the unjust, that he might present us to God; being put to death in the flesh, but quickened in the spirit." He says these things, reducing them to their faith. That is, He became alive in our spirits. "Coming," he says, "He preached to those who were once unbelieving." They saw not His form, but they heard His voice.”