"You cannot serve both God and money."
"Do not store up for yourselves treasures on earth, where moths and vermin destroy, and where thieves break in and steal. But store up for yourselves treasures in heaven, where moths and vermin do not destroy, and where thieves do not break in and steal. For where your treasure is, there your heart will be also.
The eye is the lamp of the body. If your eyes are healthy, your whole body will be full of light. But if your eyes are unhealthy, your whole body will be full of darkness. If then the light within you is darkness, how great 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 both God and money." (Matthew 6:19-24)
Here are two questions: How do you serve money? And how do you serve God?
We serve money not by doing anything for money, but by believing in money, that they will fulfill its promise to deliver and provide for us.
And we serve God not in helping a weak God to do a better job of running his world, but we serve him by trusting in him, that he is all sufficient, all powerful, and self-existent and able to fulfill his promises to those who trust in him to care for them.
So the question for the heart is: What or who do I believe in and trust in and depend on at the core of my being, money or God?
These thoughts have been inspired by John Piper.