It came to him in a dream. The Beatles song “Let It Be” was written because Paul’s late mother, Mary, came to him in a dream and he was inspired to write a song. It was on the album of the same name and it spent two weeks at number-one on the Billboard Hot 100 in 1970 Paul McCartney explains that he wrote “Let It Be” at about the time The Beatles had begun the contentious recording sessions for the album of the same title. It was literally inspired by seeing his late mother, Mary Patricia Mullen McCartney, in that dream.
“We were all getting a little crazy, and I’d gone to bed one night well crazy and had a dream. And she’d been in the dream, which is always lovely, you know, when people who’ve been long gone come in dreams, ‘cause you actually meet them again, even if it’s just within the confines of your own head. And she said, ‘You’ll be alright.’ She was very sort of calming and I woke up thinking, ‘I feel better about things.’ As I usually did, I started writing a song. And because she was my mother and her name was Mary, I said, ‘Mother Mary comes to me.’”