„When I knocked, the door opened. When I looked, I found.“

— Paulo Coelho
„Jools Holland: "Knock Knock!"Morrissey: "I'm not in!"Jools: "Oh, come on."Morrissey: "I refuse to open the door."“
— Morrissey
„Not knowing when the dawn will comeI open every door.“
— Emily Dickinson
„They are so busy knocking that they do not notice that the door is open!“
— Agatha Christie