Maxwell's Silver Hammer is a song about karma originally presented by Paul for inclusion on The Beatles but was rejected by the others on the basis that it was too complicated. It was resurrected for Abbey Road and work on the track was slated to begin upon John's return from recovery following an automobile accident, but he hated the song and refused to participate, dismissing it as "more of Paul's granny music". He left the sessions and didn't return until two weeks later for Come Together.
"Just when everything is going smoothly, 'bang bang' down comes Maxwell's Silver Hammer and ruins everything." - Paul
"We had to play it over and over again until Paul liked it. It was a real drag." - George
"It was granny music. But we needed stuff like that on our album so other people would listen to it." - Ringo