Charles Ellicott Commentary Proverbs 14:8

"The wisdom of the prudent is to understand his way; But the folly of fools is deceit." — Proverbs 14:8 (ASV)

The wisdom of the prudent is to understand his way— To look to it carefully that it is such as God would have it; but the folly of fools (stupid persons, as in Proverbs 14:7), is deceit; it shows itself in trying to cheat others, though they are sure to be detected at last.