Irena Paulus, "Williams versus Wagner or an Attempt at Linking Musical Epics" International Review of the Aesthetics and Sociology of Music31 2 (2000): 153. "John Williams used leitmotifs in the genuine sense of the word. He has come very close to the practice of Wagner in the various procedures in which he varies and transforms his themes, and in using the idea of the thematic image (the arch-theme that is the unifying element of the musical material). However, the similarity of Williams's and Wagner's leitmotifs is greatest in the area of kinship of themes (a series of new themes or motifs derive from a single motif or theme) on the basis of which both of them create a web of mutually related leitmotifs. The closeness of the procedures of the two can also be found in the area of melody, rhythm, form, harmony, instrumentation, and even in the domain of the ratio of the old and the new in their music. The ultimate objective of Richard Wagner was to create the music drama, music for the stage based on the old roots of opera, in which all the musical elements were subordinated to the drama. The ultimate aim of John Williams was to take part in the creation of a film in which his music would serve to define the film's substance and help all the other elements of it to function property."