“No man can serve two masters: for either he will hate the one, and love the other; or else he will hold to the one, and despise the other. Ye cannot serve God and mammon.”
Surely, it is a generous thing to do trying to serve two masters. It will always come down to that point where you will have to stay loyal to one more than the other. A time will come when you will have make the decision to chose between both.
Bishop Dag explains in this sermon why it is not right to serve two masters.