The wisdom of the shrewd is to understand his own way, but the folly of fools is deceit.
In context
6The scoffer looks for wisdom and finds none, but knowledge comes easily to the discerning. 7Keep away from a fool; you will find no lips of knowledge there. 8The wisdom of the shrewd is to understand his own way, but the folly of fools is deceit. 9The senseless scoff at guilt, but among the upright there is favor. 10The heart knows its own bitterness, and no stranger shares its joy.
