Matthew 6:24

No man can serve two masters. He cannot give his heart to two services at the same time. He cannot follow two callings successfully.

Ye cannot serve God and mammon. This is the direct application. The Chaldee word "Mammon" means money or riches. It is here personified as an idol. "Mammon" originally meant "trust", or confidence, and riches is the trust of worldly men. If God be not the object of supreme trust, something else will be, and it is more likely to be money.
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