A Commentary, Critical, Practical, and Explanatory on the Old and New Testaments, by Robert Jamieson, A.R. Fausset and David Brown  at sacred-texts.com
pro 13:1(Pro. 13:1-25)
(Compare Pro 6:1-5; Pro 10:1, Pro 10:17).
pro 13:2shall eat--that is, obtain (Pro 12:14).
transgressors--as in Pro 2:22.
violence--or, "mischief" to themselves.
pro 13:3He . . . mouth . . . life--because evil speeches may provoke violence from others.
he that openeth wide his lips shall have destruction--On last clause, compare Pro 10:14.
pro 13:4(Compare Pro 12:11, Pro 12:27).
pro 13:5loathsome . . . shame--better, causeth shame and reproach (compare Pro 19:26), by slander, &c., which the righteous hates.
pro 13:6A sentiment of frequent recurrence, that piety benefits and sin injures.
pro 13:7In opposite ways men act hypocritically for gain of honor or wealth.
pro 13:8Riches save some from punishment, while others suffer because they will not heed the rebuke of sloth, which makes and keeps them poor.
pro 13:9light . . . lamp--prosperity; the first, the greater, and it
rejoiceth--burns brightly, or continues, while the other, at best small, soon fails.
pro 13:10The obstinacy which attends self-conceit, produces contention, which the well-advised, thus evincing modesty, avoid.
pro 13:11by vanity--or, "nothingness," that is, which is vain or useless to the public (as card playing or similar vices).
gathereth . . . labour--(Compare Margin), little by little, laboriously.
pro 13:12desire cometh--is realized.
a tree of life--or, "cause of happiness."
pro 13:13the word--that is, of advice, or, instruction (compare Pro 10:27; Pro 11:31).
pro 13:14(Compare Pro 10:11).
fountain--or, "source of life."
to depart--(compare Pro 1:2-4), or, "for departing," &c., and so gives life.
pro 13:15Right perception and action secure good will, while evil ways are difficult as a stony road. The wicked left of God find punishment of sin in sinning.
hard--or, "harsh" (compare Hebrew: Deu 21:4; Jer 5:15).
pro 13:16dealeth--acts with foresight.
a fool . . . folly--for want of caution.
pro 13:17A wicked--or, "unfaithful"
messenger falleth into mischief--or, "by mischief," or "evil," and so his errand fails. Contrasted is the character of the faithful, whose faithfulness benefits others.
pro 13:18(Compare Pro 10:17; Pro 12:1).
pro 13:19Self-denial, which fools will not endure, is essential to success.
pro 13:20The benefits of good and evil of bad society are contrasted.
pro 13:21(Compare Pro 11:31).
good . . . repaid--or, "He (God) will repay good."
pro 13:22wealth . . . just--While good men's estates remain in their families, God so orders that the gains of sinners enure to the just (compare Pro 28:8; Psa 37:18, Psa 37:22, Psa 37:26, &c.).
pro 13:23The laboring poor prosper more than those who injudiciously or wickedly strive, by fraud and violence, to supersede the necessity of lawful labor.
pro 13:24spareth--or, "withholds."
hateth--or, acts as if he hated him (compare Pro 3:12; Pro 8:36).
chasteneth . . . betimes--or, "diligently seeks for him all useful discipline."
pro 13:25The comparative temporal prosperity of the righteous and wicked, rather than contentment and discontent, is noted.