YESTERDAY

Yesterday 
All my troubles seem so far away
Now it looks as though there here to stay
Oh, I believe in yesterday
Suddenly,

I'm not half a man I used to be
There's a shadow hanging over me
Oh, I believe in
Yesterday

Reff: 

Why she had to go I don't know
She wouldn't say
I said something wrong
Now I long for yesterday

Yesterday,

Love was such an easy game to play

Now, I need a place to hide away

Oh, I believe in Yesterday

Commentary:

This song was so popular in 1963, when it was released by The Beatles. It tell us that yesterday has so many problems. Leave it, and face the new one instead of thinking about yesterday with it's many unsolved problems.