This is to the same purport with Pro 15:2, and shows what a blessing a wise man is and what a burden a fool is to those about him. Only here observe further, 1. That we then use knowledge aright when we disperse it, not confine it to a few of our intimates, and grudge it to others who would make as good use of it, but give a portion of this spiritual alms to seven and also to eight, not only be communicative, but diffusive, of this good, with humility and prudence. We must take pains to spread and propagate useful knowledge, must teach some that they may teach others, and so it is dispersed. 2. That it is not only a fault to pour out foolishness, but it is a shame not to disperse knowledge, at least not to drop some wise word or other: The heart of the foolish does not so; it has nothing to disperse that is good, or, if it had, has neither skill nor will to do good with it and therefore is little worth.

The lips of the wise disperse knowledge,.... Scatter it about for the benefit of others; they are communicative and diffusive of it unto others, that fruit may abound to their account: so the first ministers of the Gospel diffused the savour of the knowledge of Christ and his Gospel in every place; their words went into all the earth, and their sound to the end of the world; and so every Gospel minister will speak according to the oracles of God, and according to the abilities and measure of the gift which he has received; and to the utmost of his power feeds souls with knowledge and understanding;

but the heart of the foolish doth not so; does not disperse knowledge, for he has no solid substantial knowledge in him: or, "the heart of the foolish is not right" (x); it is full of folly and wickedness: or "the heart of the foolish does not disperse that which is right" (y); true and right things, and the knowledge of them; but, on the contrary, as in Pro 15:2, "pours out foolishness".

(x) "non erit rectum", Pagninus, Baynus; "non est rectum", Piscator, Mercerus. (y) "Spargit quod abest a recto", Junius & Tremellius, Amama; "eventilant non rectum", Schultens, Cocceius.

(Compare Pro 10:20-21).

heart . . . not so--not right, or vain.