The Beatles - Yesterday

This song, composed entirely by Paul McCartney came to him literally in a dream. He awoke one night whilst staying in a London attic for the filming of the Help! movie with the entire melody and structure stuck in his head.

I got out of bed, sat at the piano, found G, found F sharp minor 7th — and that leads you through then to B to E minor, and finally back to E. It all leads forward logically. I liked the melody a lot, but because I’d dreamed it, I couldn’t believe I’d written it. I thought, ‘No, I’ve never written anything like this before.’ But I had the tune, which was the most magic thing!

McCartney would later write “Yellow Submarine” in bed, and John Lenon would also stumble upon “Nowhere man” and "Across the universe” in dreams. McCartney would later observe:

When you’re trying to write a song, there are certain times when you get the essence, it’s all there.its like an egg being laid
— not a crack or a flaw in it.

[Verse 1]
Yesterday
All my troubles seemed so far away
Now it looks as though they're here to stay
Oh, I believe in yesterday
[Verse 2]
Suddenly
I'm not half the man I used to be
There's a shadow hanging over me Oh, yesterday came suddenly
[Verse 3]
Why she had to go
I don't know, she wouldn't say
I said something wrong Now I long for yesterday
[Verse 4] Yesterday
Love was such an easy game to play
Now I need a place to hide away
Oh, I believe in yesterday