The opposite pole of Beuys' focus on language, sound, and communication was his development of the concept of silence. In 1964, on German television, Beuys uttered his now-famous claim, "the silence of Duchamp is overrated." His comment in part referred to the 1963 Ingmar Bergman film Das Schweigen (The Silence), Bergman's exploration of human frailty. Beuys created a multiple of the same title in 1973, covering five reels of 35mm film with copper and zinc, hence halting or "silencing" the communicative potential of the reels and aligning himself with Bergman as one who is concerned about the presence of God in contemporary life.