Full Circle is Mike Portnoy's ode to progressive rock, shown in the lyrics by several underlying references to his favorite songs, bands and more. Once again a reference is made to the unifying theme of the song ('Everything ends where it begins'). The enumeration using the last syllable/word as the beginning of the next reference enhances the message that everything is linked, a common theme throughout Dream Theater's albums. (i.e. Day for Night, mare Cinema, Show). There is also another subtle nod to the theme in the references themselves; the section begins and ends with a Pink Floyd reference.