Answer not a fool - On this and the following verse Bishop Warburton, who has written well on many things, and very indifferently on the doctrine of grace, has written with force and perspicuity: "Had this advice been given simply, and without circumstance, to answer the fool, and not to answer him, one who had reverence for the text would satisfy himself in supposing that the different directions referred to the doing a thing in and out of season;
2. "The cause assigned for directing to answer, as plainly intimates that the sage should address himself to confute the fool upon his own false principles, by showing that they lead to conclusions very wide from, very opposite to, those impieties he would deduce from them. If any thing can allay the fool's vanity, and prevent his being wise in his own conceit, it must be the dishonor of having his own principles turned against himself, and shown to be destructive of his own conclusions." - Treatise on Grace. Preface.
Two sides of a truth. To “answer a fool according to his folly” is in Proverbs 26:4 to bandy words with him, to descend to his level of coarse anger and vile abuse; in Proverbs 26:5 it is to say the right word at the right time, to expose his unwisdom and untruth to others and to himself, not by a teaching beyond his reach, but by words that he is just able to apprehend. The apparent contradiction between the two verses led some of the rabbis to question the canonical authority of this book. The Pythagoreans had maxims expressing a truth in precepts seemingly contradictory.