To illustrate the four-way split personality of Jimmy, Townshend wrote four themes, reflecting the four members of the Who. These were "Bell Boy" (Moon), "Is It Me?" (Entwistle), "Helpless Dancer" (Daltrey) and "Love Reign O'er Me" (Townshend). Two lengthy instrumentals on the album, the title track and "The Rock" contain the four themes, separately and together. The instrumentals were not demoed but built up in the studio. Who author John Atkins described the instrumental tracks as "the most ambitious and intricate music the group ever undertook."