religion in keeping it postive

For those people who consider themselves religious: What keeps you following your religion? Is is habit? Is it culture?
Is it strong faith and beliefs? Is it community? All your activities and many of your friends center around the religion. Is it "the way it is"? You were brought up this way and cannot consider anything different. It is your life?

I am not trying to give anyone a hard time, or denigrate any specific religion. I am curious.