(en) Richie Unterberger, « Spirit in the Sky – Overview », sur AllMusic, Rovi Corporation (consulté le ) : « The handclaps and riffs (...) simmered down a little to allow Greenbaum to sing a tune which really did sound like a genuine gospel song (...) The gospel feel was amplified by creditably wailing backup female singers »
(en) Jermy Leeuwis, « Jason Mraz – Spirit In The Sky », MusicRemedy (consulté le ) : « Jason Mraz's new song is a bluesy, gospel-influenced version of Norman Greenbaum's 1970 psychedelic rock anthem 'Spirit in the Sky.' »