Matt. 16:19, and it may have been developed along the lines of Isa. 22:22. If (an) may also be rendered “when.” Forgive (aphienai) means literally “to release” or “let go.” Retain translates kratein which means “to hold on to” and is nowhere else used in this sense of “holding sins.” It seems to occur as a result of seeking a parallel to forgive. The tenses of the two verbs are different. This leads some to think that forgiving (an aorist subjunctive) is a single action confined to one point in time,
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