Ambrosiaster : Someone who repents is troubled by the fear that he might sin again. But a person who knows that he has been deformed by sin longs to reform himself. One who knows that he is being rebuked for his own good begins to experience a zeal for bringing good works to completion. — COMMENTARY ON PAUL'S EPISTLES Basil of Caesarea : One who provokes godly grief in us is our benefactor. — THE LONG RULES 52 John Chrysostom : "For behold," he saith, "this self-same thing, that ye were made sorry after a godly sort, what earnest care it wrought in you." 'For not only,' he saith, 'did your sorrow not cast you into that condemning of yourselves, as having acted idly in so doing; but it made you even more careful.' Then he speaks of the certain tokens of that carefulness; "Yea," what "clearing of yourselves," towards me. "Yea, what indignation" against him that had sinned. "Yea, what fear." For so great carefulness and very speedy reformation was the part of men who feared exceedingly. And that he might not seem to be exalting himself, see how quickly he softened it by saying, "Yea, what longing," that towards me. "Yea, what zeal," that on God's behalf. "Yea, what avenging:" for ye also avenged the laws of God that had been outraged. "In every thing ye approved yourselves to be pure in the matter." Not only by not having perpetrated, for this was evident before, but also by not consenting unto it. For since he said in the former Epistle, "and ye are puffed up;" he also says here, 'ye have cleared yourselves of this suspicion also; not only by not praising, but also by rebuking and being indignant.' — Homily 15 on 2 Corinthians