“Boy, you knock on the devil's door and he will head slam you through the wall.”

“When the devil comes knocking on your door simply say "Jesus, it's for you.”

“When you try to generate ideas, think of yourself as a sales person knocking on a whole subdivision of doors. Some won't open at all, some will open a suspicious crack, and some will slam in your face. But the more doors you knock on, the greater your chances of being invited in.”

“I had an apartment and I had a neighbor, and whenever he would knock on my wall, I knew he wanted me to turn my music down, and that made me angry 'cause I like loud music… So when he knocked on the wall, I'd mess with his head. I'd say "Go around! I cannot open the wall! I don't know if you have a door on your side, but over here there's nothin.'”

“Shall I show you the door… or would you rather go out through the wall?" - Maris”

“The major problem of life is learning how to handle the costly interruptions. The door that slams shut, the plan that got sidetracked, the marriage that failed. Or that lovely poem that didn't get written because someone knocked on the door.”

“I don't see white police officers slamming the heads of little white boys into police cars.”

“He was a skater boy. She said: 'see you later, boy'. He wasn't good enough for her. Now, he's a superstar. Slamming on his guitar, to show pretty face what he's worth.”

“The world is the closed door. It is a barrier. And at the same time it is the way through.

Two prisoners whose cells adjoin communicate with each other by knocking on the wall. The wall is the thing which separates them but it is also their means of communication. … Every separation is a link.”

“You can knock on a deaf man's door forever.”