Matthew Henry's Complete Bible Commentary

Verse 18

Observe here, Malice is folly and wickedness. 1. It is so when it is concealed by flattery and dissimulation: He is a fool, though he may think himself a politician, that hides hatred with lying lips, lest, if it break out, he should be ashamed before men and should lose the opportunity of gratifying his malice. Lying lips are bad enough of themselves, but have a peculiar malignity in them when they are made a cloak of maliciousness. But he is a fool who thinks to hide any thing from God. 2. It is no better when it is vented in spiteful and mischievous language: He that utters slander is a fool too, for God will sooner or later bring forth that righteousness as the light which he endeavours to cloud, and will find an expedient to roll the reproach away. MHBCC 639.20