God is King of the Universe and Giver of all good things. God's very character is one of immeasurable generosity, demonstrated by the giving of His Son for our salvation and abundant life. When we mimic His generosity through our giving we reflect His character, which brings Him great pleasure. Giving to God through the local church is a way to uphold these truths in our daily lives.
A natural result of generosity is that it acts as an antidote to envy and covetousness while fueling the good works and good deeds of the people of God in this city.
In the end, our regular, generous, cheerful giving is a pure act of worship and acknowledgement that God is King and we are His people.