The Green Hills of Earth final, titular verse. Heinlein wrote several fragments of lyrics and six full stanzas for the song. Moore and Kuttner also give fragments of lyrics in "Quest of the Starstone." The fragments have been filled out and additional stanzas added by the filk community. Some versions combine Heinlein's and Moore's lyrics. The song's meter allows it to be sung to a number of popular tunes, including "Amazing Grace"; "Greensleeves"; "The House of the Rising Sun"; "The Rising of the Moon" / "The Wearing of the Green"; Friedrich Schiller's "Ode to Joy" (used in Beethoven's Ninth Symphony, fourth movement); "Oh My Darling,
Symphony No. 9 (Beethoven) material from each of the preceding three movements – though none are literal quotations of previous music – are successively presented and then dismissed by instrumental recitatives played by the low strings. Following this, the 'Ode to Joy' theme is finally introduced by the cellos and double basses. After three instrumental variations on this theme, the human voice is presented for the first time in the symphony by the baritone soloist, who sings words written by Beethoven himself: <nowiki>"</nowiki>"O Freunde, nicht diese Töne!' Sondern laßt uns angenehmere anstimmen, und freudenvollere".<nowiki>"</nowiki> ("Oh friends, not these sounds! Let us instead strike up