Our church has a lot of rules. No smoking, no drinking, no tobacco, no coffee, no tea, no sex outside of a legal marriage, attend church weekly for 3 full hours, tithe 10% of our income to the church, and the list goes on.
So why do we, as church members, obey those rules? The reason is two-fold. One, we are told to. And two, because we love the Lord and wish to do as he wants us to do. I suppose actually there is a third reason. We are happy when we follow the rules.