To have a god is to expect everything good from him and to take refuge in him in all times of need. He is also the one who is to receive thanks for providing help. Thou shalt have no other gods before Me. They are all-inclusive. You can not give God second place and still claim Him as your God.
Christian stewardship is concerned with priorities.
We can not give God the crumbs and leftovers of our love, time, energy, money, etc., and still claim He has first place. God wants us to recognize Him as our highest good. He wants us to depend on Him. He wants to be our God. No one loves us as much as God.