Proverbs 18:2 (BSB)

A fool does not delight in understanding, but only in airing his opinions.

From Proverbs 18. Also in the ESV.

Commentary on Proverbs 18:2

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Proverbs 18:2: A fool may pretend to understanding, and to seek and intermeddle with the means of it, but, 1. He has no true delight in it; it is only to please his friends or save his credit; he does not love his book, nor his business, nor his Bible, nor his prayers; he would rather be playing the fool with his sports.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Proverbs 18:2: A fool hath no delight in understanding,.... In natural understanding, and in the improvement of his mind in it; he delights not in books, nor in the conversation of men of learning and sense: or in spiritual understanding, in the understanding of spiritual things; these are foolishness to a natural man; nor does he delight in reading the Scriptures, nor in hearing the word, and...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Proverbs 18:2: that his heart . . . itself--that is, takes pleasure in revealing his folly (Pro 12:23; Pro 15:2).
• Geneva Bible Notes (Reformed), Geneva Bible Study Notes on Proverbs 18:2: A fool hath no delight in understanding, but that his heart may reveal itself. (b) That is, that he may talk licentiously of whatever comes to mind.