The heart.
v.12 The mocker. The mocker will not accept correction (he resents it) and will not consult the wise (will not walk with the wise). The wise man (or woman) will, by implication, do just the opposite. A man becomes wise through instruction and association with the wise, the mocker rejects both. See also 15:10.
v.13 Happy heart. Your emotional state is reflected in your face and your soul. A happy (joyful) heart is reflected by a cheerful face (and spirit); a sad (troubled) heart by a crushed spirit (and face). Feelings deep inside will find a way out in your demeanor.
v.14 Discerning heart. Similar to 15:7 this proverb indicates that the wise are discerning and seek after knowledge. The fool feeds on (acquires) folly. Perhaps his own as in 26:11.
v.15 Cheerful heart. The days of the inwardly oppressed (or the needy) are evil, but the cheerful of heart feast continually. Life is hard, but if you adopt a cheerful attitude, the circumstances are irrelevant.
Contentment.
v.16 Spiritual wealth. Spiritual wealth is far better than material wealth. Fear of the Lord causes contentment and tranquility which is far better than the trouble and turmoil one may have with material wealth.
v.17 Love. Better a peanut butter sandwich with love than a Big Mac with hatred. Happy, loving relationships are to be preferred to a great meal with strife. Don’t despise humble circumstances if that is where you are.
v.18 Patience. It takes great patience to maintain the peace. The proverb contrasts the hot-tempered man with one who is slow to anger. The first stirs up trouble while the second calms the situation down.
The sluggard and fools.
v.19 The way of life. The way of a sluggard is blocked with many thorny obstacles. The way of the diligent, upright man is a smooth, level highway. See 28:19. Avoid laziness and pursue virtue.
v.20 Parental joy. A wise son causes joy for his parents, but the fool inflicts grief on his mother (see 10:1). That the fool despises his mother is evidenced by the grief he brings on her.
v.21 The straight course. The fool follows any whim and he lacks the good sense to see the folly in it. By contrast, the man of understanding stays on the straight and narrow path. The good lifestyle is built on wise decisions which is built on character which is built on knowledge.
v.22 Many advisers. Plans fail for lack of wise counsel, but with many (wise) advisers they succeed. See 11:14. This can be observed on a national level in things like the invasion of Iraq. Commit to submitting your plans to the wisdom of others. As an example, consider Rehoboam (1 Kgs 12:1-15).
v.23 A word in season. It is a joy to give an apt reply (timely and fitting advice) and very good is a word in season (which requires knowledge and wisdom).
v.24 Path of life. The path of life leads upward for the wise (prudent) to keep him from going downward to Sheol (the grave). “A life of wisdom preserves life” (Ross, 142).
These proverbs teach that the path of life leads upward (to heaven) for the wise. Have a cheerful attitude in whatever life circumstances you find yourself in. Associate yourself with those who can give wise counsel. Submit the plans of your life to the wisdom of others.