According to author Ian MacDonald, "A Day in the Life" was strongly informed by Lennon's LSD-inspired revelations, in that the song "concerned 'reality' only to the extent that this had been revealed by LSD to be largely in the eye of the beholder". Having long resisted Lennon and George Harrison's insistence that he join them and Ringo Starr in trying LSD, McCartney took it for the first time in late 1966. This experience contributed to the Beatles' willingness to experiment on Sgt. Pepper and to Lennon and McCartney returning to a level of collaboration that had been somewhat absent.
According to author Ian MacDonald "A Day in the Life" was strongly informed by Lennon's LSD-inspired revelations, in that the song "concerned 'reality' only to the extent that this had been revealed by LSD to be largely in the eye of the beholder". Having long resisted Lennon and George Harrison's insistence that he join them and Ringo Starr in trying LSD, McCartney took it for the first time in late 1966. This experience contributed to the Beatles' willingness to experiment on Sgt. Pepper and to Lennon and McCartney returning to a level of collaboration that had been somewhat absent.