Chapter 32 — Part III: The Decalogue — The Ninth and Tenth Commandments
Section 17. Two Kinds Of Sinful Concupiscence — This kind of covetousness is condemned, either because it desires what is evil, such as adultery, drunkenness, murder, and such heinous crimes, of which the Apostle says: Let us not covet evil things, as they also coveted; or because, although the objects may not be bad in themselves, yet there is some other reason which makes it wrong to desire them, as when, for instance, God or His Church prohibit their possession; for it is not permitted us to desire these things which it is altogether unlawful to possess. Such were, in the Old Law, the gold and silver from which idols were made, and which the Lord in Deuteronomy forbade anyone to covet