Written by George as his only contribution to Sgt. Pepper's Lonely Hearts Club Band, Within You Without You is based on Hindu teachings and was written shortly after George discovered the Indian instrument the sitar. It was written on a pedal harmonium at friend Klaus Voormann's house, who drew the cover for Revolver and later the three Anthology albums. The song also struck a chord with people who took acid, as they often felt a cosmic oneness when high.
The laughter at the end of the song was once rumored to be the band laughing because George dropped his pants, but in fact it came from a sound effects tape. The track source is different on the mono version than the stereo version.