In Catholicism , the Nicene Creed is used very often ; but there are others , such as the Athanasian Creed or Apostles ' Creed . A credo ( pronounced , Latin for `` I Believe '' ) is a statement of belief , commonly used for religious belief , such as the Apostles ' Creed . The term especially refers to the use of the Nicene-Constantinopolitan Creed ( or less often , the Apostles ' Creed ) in the Mass , either as text , Gregorian chant , or other musical settings of the Mass.