Observe, 1. Modesty is the badge of wisdom. He that is truly wise hides his treasure, so as not to boast of it (Mat 13:44), though he does not hide his talent, so as not to trade with it. His wisdom rests in his heart; he digests what he knows, and has it ready to him, but does not unseasonably talk of it and make a noise with it. The heart is the seat of the affections, and there wisdom must rest in the practical love of it, and not swim in the head. 2. Openness and ostentation are a mark of folly. If fools have a little smattering of knowledge, they take all occasions, though very foreign, to produce it, and bring it in by head and shoulders. Or the folly that is in the midst of fools is made known by their forwardness to talk. Many a foolish man takes more pains to show his folly than a wise man thinks it worth his while to take to show his wisdom.

Wisdom resteth in the heart of him that hath understanding,.... It is in his heart, as the treasury where it is laid up, and where it is kept in safety; here it lies hid and undiscerned, unmolested and undisturbed; no noise is made about it, or any ostentation of it; it dwells quietly and constantly there;

but that which is in the midst of fools is made known; the least share of knowledge which such persons have, or think they have, does not lie long in the midst of them; they take every opportunity of showing it to others, or of letting others know what they have attained to; and thereby, instead of getting the character of wise and prudent men, obtain that of fools; for, though a prudent man is communicative of his knowledge to others, it is at proper times, and in proper places, and to proper persons, which fools do not observe; but, without any manner of judgment or discretion, or regard to persons, places, and seasons, vainly thrust out their knowledge, and so proclaim their folly. The Syriac version is,

"in the heart of fools it shall not be known;''

it has no place there.

resteth--preserved in quietness for use, while fools blazon their folly (Pro 12:23; Pro 13:16).