You Cannot Serve Two Masters
No one can serve two masters, for a slave will either hate the one and love the other or be devoted to the one and despise the other. You cannot serve God and wealth.
Matthew 6:24
Jesus names money as God's chief rival, not as a tool but as a competing master. When tested about taxes, he drew the same line: give Caesar what is Caesar's, and give God what is God's, which is everything bearing his image, meaning you.
Jesus rules out the arrangement most of us attempt: a diversified portfolio of loyalties. Two masters do not split you fifty fifty. One quietly becomes lord and the other becomes a hobby, and money is exceptionally good at winning that contest unnoticed.
Audit your last month honestly: which master got the anxiety, the daydreams, the first energy of the day? Then demote money to servant, where it does real good, by giving some of it away.