Clement of Alexandria
"the fire sanctifies not flesh, but sinful souls; meaning not the all-devouring vulgar fire but that of wisdom, which pervades the soul passing through the fire." Stromata Book VII, Chapter VI, last verse.
" chastisements, which many of us who have been in transgression incur, by falling away from the Lord’s people. But as children are chastised by their teacher, or their father, so are we by Providence. But God does not punish, for punishment is retaliation for evil. He chastises, however, for good to those who are chastised, collectively and individually." Stromata Book VII, Chapter 16 Page 553
"the good God corrects for these three causes: