Proverbs 15:2 (BSB)

The tongue of the wise commends knowledge, but the mouth of the fool spouts folly.

From Proverbs 15. Also in the ESV.

Commentary on Proverbs 15:2

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Proverbs 15:2: Note, 1. A good heart by the tongue becomes very useful. He that has knowledge is not only to enjoy it, for his own entertainment, but to use it, to use it aright, for the edification of others; and it is the tongue that must make use of it in pious profitable discourse, in giving suitable and seasonable instructions, counsels, and comforts, with all possible...
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Proverbs 15:2: The tongue of the wise useth knowledge aright,.... As the heart of a wise and good man is filled with useful knowledge, civil, moral, spiritual, and evangelical; so he takes care to communicate it, at proper times and seasons, in proper places, and to proper persons; adapting it to their case and circumstances, so as it may be for their comfort, edification, and instruction, and...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Proverbs 15:2: useth . . . aright--commends knowledge by its proper use. poureth out--utters abundantly (Pro 12:23), and so disgusts others.
• Keil & Delitzsch (Lutheran), Biblical Commentary on the Old Testament on Proverbs 15:2: Pro 15:2 The πραΰ́της σοφίας (Jam 3:13) commended in Pro 15:1 is here continued: The tongue of the wise showeth great knowledge, And the mouth of fools poureth forth folly. As היטיב נגּן, Isa 23:16, means to strike the harp well, and היטיב לכת, Isa 30:29, to go along merrily, so היטיב דּעת, to know in a masterly manner, and here, where the subject is...