“Zeitgeist” is the most mellow track from Black Sabbath’s 13. Critics have compared its processed vocals, spacey motif and Django Reinhardt-influenced soloing to that of “Planet Caravan” from Paranoid. The word ‘Zeitgeist’ is derived from the German ‘Zeit’ meaning “time'‘ and "Geist” meaning “spirit.” It is used to describe the dominant moral or intellectual school of thought characteristic of a culture during a particular period in time.