§ I. On Idolatry

334. • Idolatry is an action by which worship owed to God alone is rendered to a creature; and this happens not only by sacrifice, but by any sign of honor by which someone intends to submit himself to a creature as to God, for example by genuflection.

Idolatry is distinguished as twofold, namely: 1° Material or simulated, when someone without internal affection, from grave fear, shows worship to an idol. It would also be called material if it proceeded from invincible error, for example if someone, falsely thinking a host to be consecrated, were to adore it. - In the first case it would be a mortal sin; in the second, none, as is clear.

2° Formal and proper, which is done 1° by adoring a creature as God; 2° by showing worship to a demon or another creature as if to God, or at least from the mind of obtaining something from such a creature which can be asked from God alone.³