He said, “But do not lay up for yourselves treasures on earth, where moth and rust destroy, and where thieves break in and steal; but lay up for yourselves treasures in heaven, where neither moth nor rust destroys, and where thieves do not break in and steal.” Heavenly treasures, represented by virtues, are imperishable and everlasting, which no one can take away. In contrast, earthly treasures may provide temporary enjoyment but ultimately do not accompany one into eternity and fail to offer lasting joy. Earthly possessions can lead to sadness if lost and bind the heart in chains. Hence, the Saviour remarked, “For where your treasure is, there your heart will be also.” He illustrated the detrimental effects of being enslaved by worldly desires on the heart—the core of spiritual life—by comparing it to the eye, stating that it serves as the lamp of the body: “If your eye is good, your whole body will be full of light; but if your eye is bad, your whole body will be full of darkness.” If the light within you is darkness, how great is that darkness! Just as an ailment of the eye can incapacitate the entire body, so too can the darkness of covetousness harm all aspects of the soul and its functions.
Another example offered by the Lord highlights the incompatibility of attachment to fleeting possessions with the pursuit of heavenly wealth: “No one can serve two masters; for either he will hate the one and love the other, or else he will be loyal to the one and despise the other. You cannot serve God and mammon.” In this context, Mammon represented wealth itself, serving as a deity of riches among the Jews (Luke 16:9). Thus, serving Mammon amounts to an overwhelming preoccupation with wealth, suppressing other higher desires. St. John Chrysostom warned, “If we serve Mammon, we will no longer inhabit the kingdom of God; the pursuit of riches enslaves us, rendering us captives—not of mere mortals, but of the most detrimental yearnings and afflictions of the soul.” Nevertheless, this esteemed Father also noted that the proper stewardship of wealth does not conflict with serving God. He illustrated this truth with the examples of Abraham, Job, and other righteous individuals who, while not ensnared by worldly possessions, utilized them as gifts from God.