I have a feeling this won't be news to most people here—it wasn't to me—but I found the specifics touching: Paul's description of the origins of Let It Be.
Explaining the origins of ‘Let It Be’ in Many Years From Now, McCartney said: “One night during this tense time I had a dream I saw my mum, who’d been dead ten years or so. And it was so great to see her because that’s a wonderful thing about dreams: you actually are reunited with that person for a second; there they are and you appear to both be physically together again. It was so wonderful for me and she was very reassuring.”
McCartney continued: “In the dream she said, ‘It’ll be all right.’ I’m not sure if she used the words ‘Let it be’ but that was the gist of her advice, it was, ‘Don’t worry too much, it will turn out OK.’ It was such a sweet dream I woke up thinking, Oh, it was really great to visit with her again. I felt very blessed to have that dream. So that got me writing the song ‘Let It Be’.” I literally started off ‘Mother Mary’, which was her name, ‘When I find myself in times of trouble’, which I certainly found myself in. The song was based on that dream.”