Matthew Henry commentary on Proverbs 15:18-23
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20 A wise son maketh a glad father: but a foolish man despiseth his mother.
Observe here, 1. To the praise of good children, that they are the joy of their parents, who ought to have joy of them, having taken so much care and pains about them. And it adds much to the satisfaction of those that are good if they have reason to think that they have been a comfort to their parents in their declining years, when evil days come. 2. To the shame of wicked children, that by their wickedness they put contempt upon their parents, slight their authority, and make an ill requital for their kindness: A foolish son despises his mother, that had most sorrow with him and perhaps had too much indulged him, which makes his sin in despising her the more sinful and her sorrow the more sorrowful.
Embedded KJV/source Scripture
21 Folly is joy to him that is destitute of wisdom: but a man of understanding walketh uprightly.
Note, 1. It is the character of a wicked man that he takes pleasure in sin; he has an appetite to the bait, and swallows it greedily, and has no dread of the hook, nor feels from it when he has swallowed it: Folly is joy to him; the folly of others is so, and his own much more. He sins, not only without regret, but with delight, not only repents not of it, but makes his boast of it. This is a certain sign of one that is graceless. 2. It is the character of a wise and good man that he makes conscience of his duty. A fool lives at large, walks at all adventures, by no rule, acts with no sincerity or steadiness; but a man of understanding, the eyes of whose understanding are enlightened by the Spirit (and those that have not a good understanding have no understanding), walks uprightly, lives a sober, orderly, regular life, and studies in every thing to conform himself to the will of God; and this is a constant pleasure and joy to him. But what foolishness remains in him, or proceeds from him at any time, is a grief to him, and he is ashamed of it. By these characters we may try ourselves.
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22 Without counsel purposes are disappointed: but in the multitude of counsellors they are established.
See here, 1. Of what ill consequence it is to be precipitate and rash, and to act without advice: Men's purposes are disappointed, their measures broken, and they come short of their point, gain not their end, because they would not ask counsel about the way. If men will not take time and pains to deliberate with themselves, or are so confident of their own judgment that they scorn to consult with others, they are not likely to bring any thing considerable to pass; circumstances defeat them which, with a little consultation, might have been foreseen and obviated. It is a good rule, both in public and domestic affairs, to do nothing rashly and of one's own head. Plus vident oculi quam oculus—Many eyes see more than one. That often proves best which was least our own doing. 2. How much it will be for our advantage to ask the advice of our friends: In the multitude of counsellors (provided they be discreet and honest, and will not give counsel with a spirit of contradiction) purposes are established. Solomon's son made no good use of this proverb when he acquiesced not in the counsel of the old men, but because he would have a multitude of counsellors, regarding number more than weight, advised with the young men.
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23 A man hath joy by the answer of his mouth: and a word spoken in due season, how good is it!
Note, 1. We speak wisely when we speak seasonably: The answer of the mouth will be our credit and joy when it is pertinent and to the purpose, and is spoken in due season, when it is needed and will be regarded, and, as we say, hits the joint. Many a good word comes short of doing the good it might have done, for want of being well-timed. Nor is any thing more the beauty of discourse than to have a proper answer ready off-hand, just when there is occasion for it, and it comes in well. 2. If we speak wisely and well, it will redound to our own comfort and to the advantage of others: A man has joy by the answer of his mouth; he may take a pleasure, but may by no means take a pride, in having spoken so acceptably and well that the hearers admire him and say, " How good is it, and how much good does it do!"
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24 The way of life is above to the wise, that he may depart from hell beneath.
The way of wisdom and holiness is here recommended to us, 1. As very safe and comfortable: It is the way of life, the way that leads to eternal life, in which we shall find the joy and satisfaction which will be the life of the soul, and at the end of which we shall find the perfection of blessedness. Be wise and live. It is the way to escape that misery which we cannot but see ourselves exposed to, and in danger of. It is to depart from hell beneath, from the snares of hell, the temptations of Satan, and all his wiles, from the pains of hell, that everlasting destruction which our sins have deserved. 2. As very sublime and honourable: It is above. A good man sets his affections on things above, and deals in those things. His conversation is in heaven; his way leads directly thither; there his treasure is, above, out of the reach of enemies, above the changes of this lower world. A good man is truly noble and great; his desires and designs are high, and he lives above the common rate of other men. It is above the capacity and out of the sight of foolish men.
The Righteous and the Wicked Contrasted.
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25 The Lord will destroy the house of the proud: but he will establish the border of the widow.
Note, 1. Those that are elevated God delights to abase, and commonly does it in the course of his providence: The proud, that magnify themselves, bid defiance to the God above them and trample on all about them, are such as God resists and will destroy, not them only, but their houses, which they are proud of and are confident of the continuance and perpetuity of. Pride is the ruin of multitudes. 2. Those that are dejected God delights to support, and often does it remarkably: He will establish the border of the poor widow, which proud injurious men break in upon, and which the poor widow is not herself able to defend and make good. It is the honour of God to protect the weak and appear for those that are oppressed.