Matthew Henry's Concise Commentary

7:17-20 The Jews took pride in showing zeal for their idols. Let us learn to be earnest in the service of our God, even from this bad example. Let us think it an honour to be employed in any work for God. Let us be as diligent ourselves, and as careful to teach our children the truths of God, as many are to teach the mysteries of iniquity. The direct tendency of this sin is malice against God, but it will hurt themselves. And they shall find there is no escaping. God's wrath is fire unquenchable.