Augustine of Hippo
Catena Aurea · Lukasevangelium 16
And the lord commended the unjust steward, because he had done wisely: for the children of this world are in their generation wiser than the children of light. And I say unto you, Make to yourselves friends of the mammon of unrighteousness; that, when ye fail, they may receive you into everlasting habitations. He that is faithful in that which is least is faithful also in much: and he that is unjust in the least is unjust also in much. If therefore ye have not been faithful in the unrighteous mammon, who will commit to your trust the true riches? And if ye have not been faithful in that which is another man’s, who shall give you that which is your own? No servant can serve two masters: for either he will hate the one, and love the other; or else he will hold to the one, and despise the other. Ye cannot serve God and mammon.
(de Qu. Ev. lib. ii. q. 36.) But these things were not spoken indifferently or at random. For no one when asked whether he loves the devil, answers that he loves him, but rather that he hates him; but all generally proclaim that they love God. Therefore either he will hate the one, (that is, the devil,) and love the other, (that is, God;) or will hold to the one, (that is, the devil, when he pursues as it were temporal wants,) and will despise the other, (that is, God,) as when men frequently neglect His threats for their desires, who because of His goodness flatter themselves that they will have impunity.