Now there are some who say that the words, “the covetous man is an idolater,” are hyperbolical. However, the statement is not hyperbolical, it is true. How, and in what way? Because the covetous man apostatizes from God, just as the idolater does. And lest you should imagine this is a bare assertion, there is a declaration of Christ which says, “You cannot serve God and Mammon.” If then it is not possible to serve God and Mammon, they who serve Mammon have thrown themselves out of the service of God; and they who have denied His sovereignty, and serve lifeless gold, it is plain enough that they are idolaters. “But I never made an idol,” a man will say, “nor set up an altar, nor sacrificed sheep, nor poured libations of wine; no, I came into the church, and lifted up my hands to the Only-begotten Son of God; I partake of the mysteries, I communicate in prayer, and in everything else which is a Christian's duty. How then,” he will say, “am I a worshiper of idols?” Yes, and this is the very thing which is the most astonishing of all, that when you have had experience, and hast “tasted” the lovingkindness of God, and “hast seen that the Lord is gracious”, you should abandon Him who is gracious, and take to yourself a cruel tyrant, and should pretend to be serving Him, while in reality you have submitted yourself to the hard and galling yoke of covetousness. You have not yet told me of your own duty done, but only of your Master's gifts. For tell me, I beseech you, whence do we judge of a soldier? Is it when he is on duty guarding the king, and is fed by him, and called the king's own, or is it when he is minding his own affairs and interests? To pretend to be with him, and to be attentive to his interests, while he is advancing the cause of the enemy, we declare to be worse than if he breaks away from the king's service, and joins the enemy. Now then you are doing despite to God, just as an idolater does, not with your own mouth singly, but with the ten thousands of those whom you have wronged. Yet you will say, “an idolater he is not.” But surely, whenever they say, “Oh! That Christian, that covetous fellow,” then not only is he himself committing outrage by his own act, but he frequently forces those also whom he has wronged to use these words; and if they use them not, this is to be set to the account of their reverence.
Do we not see that such is the fact? What else is an idolater? Or does not he too worship passions, oftentimes not mastering his passions? I mean, for example, when we say that the pagan idolater worships idols, he will say, “No, but it is Venus, or it is Mars.” And if we say, Who is this Venus? The more modest among them will say, It is pleasure. Or what is this Mars? It is wrath. And in the same way do you worship Mammon. If we say, Who is this Mammon? It is covetousness, and this you are worshiping. “I worship it not,” you will say. Why not? Because thou dost not bow yourself down? Nay, but as it is, you are far more a worshiper in your deeds and practices; for this is the higher kind of worship. And that you may understand this, look in the case of God; who more truly worship Him, they who merely stand up at the prayers, or they who do His will? Clearly enough, these latter. The same also is it with the worshipers of Mammon; they who do his will, they truly are his worshipers. However, they who worship the passions are oftentimes free from the passions. One may see a worshiper of Mars oftentimes governing his wrath. But this is not true of you; you make yourself a slave to your passion.
Yes, but you slay no sheep? No, you slay men, reasonable souls, some by famine, others by blasphemies. Nothing can be more frenzied than a sacrifice like this. Who ever beheld souls sacrificed? How accursed is the altar of covetousness! When you pass by this idol's altar here, you shall see it reeking with the blood of bullocks and goats; but when you shall pass by the altar of covetousness, you shall see it breathing the shocking odor of human blood. Stand here before it in this world, and you shall see, not the wings of birds burning, no vapor, no smoke exhaled, but the bodies of men perishing. For some throw themselves among precipices, others tie the halter, others thrust the dagger through their throat. Have you seen the cruel and inhuman sacrifices? Would you see yet more shocking ones than these? Then I will show you no longer the bodies of men, but the souls of men slaughtered in the other world. Yes, for it is possible for a soul to be slain with the slaughter peculiar to the soul; for as there is a death of the body, so is there also of the soul. “The soul that sins,” says the Prophet, “it shall die.” The death of the soul, however, is not like the death of the body; it is far more shocking. For this bodily death, separating the soul and the body the one from the other, releases the one from many anxieties and toils, and transmits the other into a manifest abode: then when the body has been in time dissolved and crumbled away, it is again gathered together in incorruption, and receives back its own proper soul. Such we see is this bodily death. But that of the soul is awful and terrific. For this death, when dissolution takes place, does not let it pass, as the body does, but binds it down again to an imperishable body, and consigns it to the unquenchable fire. This then is the death of the soul. And as therefore there is a death of the soul, so is there also a slaughter of the soul. What is the slaughter of the body? It is the being turned into a corpse, the being stripped of the energy derived from the soul. What is the slaughter of the soul? It is its being made a corpse also. And how is the soul made a corpse? Because as the body then becomes a corpse when the soul leaves it destitute of its own vital energy, so also does the soul then become a corpse, when the Holy Spirit leaves it destitute of His spiritual energy.
Such for the most part are the slaughters made at the altar of covetousness. They are not satisfied, they do not stop at men's blood; no, the altar of covetousness is not glutted, unless it sacrifice the very soul itself also, unless it receive the souls of both, the sacrificer and the sacrificed. For he who sacrifices must first be sacrificed, and then he sacrifices; and the dead sacrifices him who is yet living. For when he utters blasphemies, when he reviles, when he is irritated, are not these so many incurable wounds of the soul?
You have seen that the expression is no hyperbole. Would you hear again another argument, to teach you how covetousness is idolatry, and more shocking than idolatry? Idolaters worship the creatures of God (“for they worshipped,” it is said, “and served the creature rather than the Creator”); but you are worshiping a creature of your own. For God made not covetousness but your own insatiable appetite invented it. And look at the madness and folly. They that worship idols, honor also the idols they worship; and if any one speak of them with disrespect or ridicule, they stand up in their defense; whereas thou, as if in a sort of intoxication, art worshiping an object, which is so far from being free from accusation, that it is even full of impiety. So that thou, even more than they, excellest in wickedness. You can never have it to say as an excuse, that it is no evil. If even they are in the highest degree without excuse, yet are you in a far higher, who art forever censuring covetousness, and reviling those who devote themselves to it, and who yet does serve and obey it.
Source: Homilies on Ephesians (New Advent)