John Gills Exposition of the Bible Commentary - Proverbs 10:23
It is as sport to a fool to do mischief ,.... To do any injury to the persons and properties of men; which shows a most wicked and malicious spirit, a very depraved nature indeed: or rather "to commit sin" F15 עשות זמה "facere scelus", Montanus, Baynus, Junius & Tremellius, Cocceius, Michaelis; "perpetrare scelus", Piscator; "patrare facinus", Schultens. of any sort, which he has devised in his own heart; it is as a "laughing" F16 כשחוק "veluti risus", Mercerus,... read more
Matthew Henry's Complete Commentary - Proverbs 10:23
Here is, 1. Sin exceedingly sinful: It is as laughter to a fool to do mischief; it is as natural to him, and as pleasant, as it is to a man to laugh. Wickedness is his Isaac (that is the word here); it is his delight, his darling, and that in which he pleases himself. He makes a laughing matter of sin. When he is warned not to sin, from the consideration of the law of God and the revelation of his wrath against sin, he makes a jest of the admonition, and laughs at the shaking of the spear;... read more