"The Sphere A Kind of Dream" is the sixth and final movement of "Cygnus X-1 Book II: Hemispheres", the opening side-long suite of Canadian rock band Rush's sixth studio album Hemispheres (1978). The epic was penned by drummer Neil Peart and composed by bassist and lead vocalist Geddy Lee and guitarist Alex Lifeson. An acoustic guitar piece lasting just more than a minute, "The Sphere" presents the message of the story, promoting a balance between heart and mind into a "single, perfect sphere". The movement has garnered critical acclaim. However, the lyrics were interpreted differently between writers, ranging from a rejection of Peart's previous Ayn Rand-influenced politics to a promotion of authoritarianism.