Matthew 6:23-24

But 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! “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].