Here is, 1. The character of a fool: He trusts to his own heart, to his own wisdom and counsels, his own strength and sufficiency, his own merit and righteousness, and the good opinion he has of himself; he that does so is a fool, for he trusts to that, not only which is deceitful above all things (Jer 17:9), but which has often deceived him. This implies that it is the character of a wise man (as before, Pro 28:25) to put his trust in the Lord, and in his power and promise, and to follow his guidance, Pro 3:5, Pro 3:6. 2. The comfort of a wise man: He that walks wisely, that trusts not to his own heart, but is humble and self-diffident, and goes on in the strength of the Lord God, he shall be delivered; when the fool, that trusts in his own heart, shall be destroyed.

He that trusteth in his own heart is a fool,.... Since the thoughts and imaginations of the thoughts of the heart are only evil, and that continually; they are vain and vague, sinful and corrupt; the affections are inordinate, the conscience defiled, the understanding darkened, and the will perverse; there is no good thing in it, nor any that comes out of it, but all the reverse; it is deceitful and desperately wicked: he must be a fool, and not know the plague of his heart, that trusts in it; and even for a good man to be self-confident, and trust to the sincerity of his heart, as Peter did, or to the good frame of the heart, as many do, is acting a foolish part; and especially such are fools as the Scribes and Pharisees, who trusted in themselves that they were righteous, and despised others, when a man's best righteousness is impure and imperfect, and cannot justify him in the sight of God; it is moreover a weak and foolish part in men to trust to the wisdom and counsel of their heart, to lean to their own understanding, even it, things natural and civil, and not to ask wisdom of God, or take the advice of men, and especially it, things religious and sacred; see Pro 3:5;

but whoso walketh wisely; as he does who walks according to the rule of the divine word; who makes the testimonies of the Lord his counsellors; who consults with his sacred writings, and follows the directions of them; who walks as he has Christ for his pattern and example, and makes the Spirit of God his guide, and walks after him, and not after the flesh; who walks with wise men, and takes their advice in all matters of moment, not trusting to his own wisdom and knowledge; who walks as becomes the Gospel of Christ, and in all the ordinances of it; who walks inoffensively to all men, and so in wisdom towards them that are without, and in love to them who are within; who walks circumspectly, not as fools, but as wise, redeeming the time;

he shall be delivered; he shall be delivered from the snares of his own deceitful heart, which he will not trust; and from the temptations of Satan; and from all afflictions and troubles he meets with in the way; and from a final and total falling away; and from eternal death and destruction: "he shall be saved", as some versions render it, even with an everlasting salvation. The Targum is,

"he shall be protected from evil.''

(Compare Pro 3:6-8).

walketh wisely--that is, trusting in God (Pro 22:17-19).