This scripture is a portion of Jesus’s sermon on the mount which is a kingdom message. What he is dealing with here is that we cannot faithfully serve two masters because our true allegiance will always favor one above the other. The masters contrasted are God and mammon. Mammon is an Aramaic term that means “wealth or material possessions that you put your trust in”. It’s not a sin to have wealth or material possessions as long as you don’t look to them for your security.
Seek First The Kingdom of God – Pastor Chris Black