This is a throwback song Paul McCartney wrote in an ashram in Rishikesh, India in 1968. Interestingly, 5 of the performers where also there, including Ringo Starr (briefly), Donovan, Mike Love (of the Beach Boys), and flautist Paul Horn. Singing it together again over 40 years later.
The course was historical in that it brought huge attention to eastern thought and lead to millions learning to meditate. It also lead to a blossoming of music like the White Album, Paul’s Inside series, and Donovan’s Cosmic Wheels and Essence to Essence. One song was later broadcast Across the Universe.
Another related song from 1972 is Cosmic Consciousness by the Natural Tendency (Rick Stanley and Paul Fauerso) This site has the lyrics and a link to the song itself. You may need to download it to play it. It’s an old favorite as it beautifully described the then experience.