John Chrysostom
After saying so much about this service, he now says, “It is unnecessary to write to you.” His wisdom is shown not only in saying, after he has already said much, “It is unnecessary to write to you,” but also in the fact that he again speaks about it.
What he had just said before concerned those who received the collected money, so that they might enjoy greater respect. What he had said still earlier about the Macedonians, that “their deep poverty abounded in the riches of their liberality,” and all the rest, was spoken about love for mankind and almsgiving.
Yet although he had already said much before, he again intends to discuss the same subject, and says, “It is unnecessary to write to you.” He does this in order to draw them more strongly.
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For a man of whom such fame is spread, that he needs no advice, is ashamed to show himself beneath the good opinion held of him and to lose it. He often acts in this way also in rebukes, using the figure of speech called passing over, παράλειψις, because it has great force.
For example, when a judge sees the magnanimity of the accuser, he no longer suspects him, reasoning thus: “If this man does not mention many things that he could mention, will he invent what never happened?” By this the accuser leads the judge to suppose that there is more in the case than he himself has said. He also gains for himself the name of an honest man.
So the Apostle acts when he gives counsel or praises someone.