Am I the wise guy or the fool?

In my studies lately I have come across some really wise advise.. that I would be remiss to not pass on. It is found in Proverbs 26: 4-5 (NIV)

4 Do not answer a fool according to his folly,
or you will be like him yourself.
5 Answer a fool according to his folly,
or he will be wise in his own eyes.

Matthew Henry a well known commentator says this
See here the noble security of the scripture-style, which seems to contradict itself, but really does not. Wise men have need to be directed how to deal with fools; and they have never more need of wisdom than in dealing with such, to know when to keep silence and when to speak, for there may be a time for both.

1. In some cases a wise man will not set his wit to that of a fool so far as to answer him according to his folly “If he boast of himself, do not answer him by boasting of thyself. If he rail and talk passionately, do not thou rail and talk passionately too. If he tell one great lie, do not thou tell another to match it. If he calumniate thy friends, do not thou calumniate his. If he banter, do not answer him in his own language, lest thou be like him, even thou, who knowest better things, who hast more sense, and hast been better taught.’’

2. Yet, in other cases, a wise man will use his wisdom for the conviction of a fool, when, by taking notice of what he says, there may be hopes of doing good, or at least preventing further, mischief, either to himself or others. “If thou have reason to think that thy silence will be deemed an evidence of the weakness of thy cause, or of thy own weakness, in such a case answer him, and let it be an answer ad hominem—to the man, beat him at his own weapons, and that will be an answer ad rem—to the point, or as good as one. If he offer any thing that looks like an argument, an answer that, and suit thy answer to his case. If he think, because thou dost not answer him, that what he says is unanswerable, then give him an answer, lest he be wise in his own conceit and boast of a victory.’’

The question for me most times is : “Am I the wise guy or the fool?”