Whether or not one believes in a god or gods, there is no denying that religion can be one hell of a powerful motivator. Sometimes a character or group of characters are (or come to believe that they are) chosen for a specific mission by their god. Sometimes they are called upon to help people in need (or maybe just bring members of a band back together), or to unite a divided country. But sometimes their mission takes on a more violent form, with the characters kicking ass or even killing for their god. See also Church Militants, who are always on a mission from God.