Comic: Alan Moore, Dave Gibbons. Keepers. Page 3

There was an anecdote: a Man comes to the doctor. He is depressed. Says life is harsh and unfair.
Says he's all alone in this awful and dark world where the future is forever hidden in the darkness.
The doctor says: "Medicine is very simple. Today the circus stands the great clown Pagliacci. Go look at it. This will help you."
The man burst into tears. And said, "But, doctor...
... I am Pagliacci".