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When - a fool walketh by the way - In every act of life, and in every company he frequents, the irreligious man shows what he is. Vanity, nonsense, and wickedness are his themes: so that in effect he saith to every one that he is a fool.

“Way” may be understood either literally (compare Ecclesiastes 10:15), or figuratively, of the course of action which he follows.

He saith … - He exposes his folly to every one he meets.

Those especially who make a profession of religion, should keep from all appearances of evil. A wise man has great advantage over a fool, who is always at a loss when he has anything to do. Sin is the reproach of sinners, wherever they go, and shows their folly.