Roman Catechism 24.27

Chapter 24 — Part III: The Decalogue — The First Commandment

Section 27. They Forbid Idols And Representations Of The Deity — As far as this Commandment is concerned, it is clear that there are two chief ways in which God's majesty can be seriously outraged. The first way is by worshipping idols and images as God, or believing that they possess any divinity or virtue entitling them to our worship, by praying to, or reposing confidence in them, as the Gentiles did, who placed their hopes in idols, and whose idolatry the Scriptures frequently condemn. The other way is by attempting to form a representation of the Deity, as if He were visible to mortal eyes, or could be reproduced by colours or figures. Who, says Damascene, can represent God, invisible, as He is, incorporeal, uncircumscribed by limits, and incapable of being reproduced under any shape. This subject is treated more at large in the second Council of Nice. Rightly, then, did the Apostles say (of the Gentiles): They changed the glory of the incorruptible God into a likeness of birds, and of four-footed beasts, and of creeping things; for they worshipped all these things as God, seeing that they made the images of these things to represent Him. Hence the Israelites, when they exclaimed before the image of the calf: These are thy gods, Israel, that have brought thee out of the land of Egypt, are denounced as idolaters, because they changed their glory into the likeness of a calf that eateth grass.