Matthew 6:20-24

20But store up for yourselves treasures in heaven, where neither moth nor rust destroys, and where thieves do not break in and steal;

21for where your treasure is, there your heart [your wishes, your desires; that on which your life centers] will be also.

22“The eye is the lamp of the body; so if your eye is clear [spiritually perceptive], your whole body will be full of light [benefiting from God’s precepts].

23But if your eye is bad [spiritually blind], your whole body will be full of darkness [devoid of God’s precepts]. So if the [very] light inside you [your inner self, your heart, your conscience] is darkness, how great and terrible is that darkness!

24“No one can serve two masters; for either he will hate the one and love the other, or he will be devoted to the one and despise the other. You cannot serve God and mammon [money, possessions, fame, status, or whatever is valued more than the Lord].