What meaning of the song across the universe?

"Across the Universe" is a drama/musical that revolves around two lovers and their friends, family and worldly conflicts that surround them in that time. It occurs in the 1960s, where war is being protested, rock & roll is becoming popular, and new trends in drugs and lifestyles are being explored. All of the songs in the movie were written and made famous by The Beatles, but sung by the actors and actresses in the movie. It's a great movie, especially for fans of The Beatles!