You can fly. You can fight evil. You can mount adventures, study magic, con the FBI, save the innocent, lead a nation. All these things and more are made possible by one man’s practice of a special art: John Williams, film composer. Williams is the composer who, more than any other, has defined movie music over the last five decades, in films from “Jaws” and the “Star Wars” series, to the “Indiana Jones” franchise, “Superman,” “Jurassic Park,” “E.T. the Extraterrestrial,” “Schindler’s List,” “Catch Me if You Can,” the first two installments of Harry Potter, and “Lincoln.” The titles of all the films scored by the onetime jazz pianist would take up half the space of this article. Suffice it to say that Williams has been nominated for more than 50 Oscars, though he has somehow managed to win only five. Williams’s importance to music goes way beyond awards and accolades. …