A system of beliefs is a set of ideas and values that guide an individual or group. An IDEOLOGY is a set of beliefs, values, and principles that guide a person's behavior. A CREDO is a statement of belief or principle. An ISM is a suffix used to form the name of a belief or doctrine. A DOGMA is a set of beliefs or principles laid down by an authority. A creed is a statement of faith or belief. Together, these terms describe a system of beliefs that guide an individual or group.