“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.”

“You are offered a chance to live and enjoy yourself in this world, but sooner or later, death will come knocking on your door.”

“Don't simply knock and wait for the door to be opened. Go look for the keys. Some fit the lock better than others.”

“When one door closes, another opens… into another room, another space, other happenings. There are many doors to open and close in our lives. Some doors we leave ajar, where we hope and plan to return. Some doors are slammed shut decisively—"No more of that!" Some are closed regretfully, softly—"It was good, but it is over." Departures entail arrivals somewhere else. Closing a door, leaving it behind, means opening onto new vistas and ventures, new possibilities, new incentives.”

“God never slams a door in your face without opening a box of Girl Scout cookies.”

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

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

“Some one came knocking
At my wee, small door;
Some one came knocking,
I’m sure—sure—sure.”

“Some doors slammed in your face need to be glued and nailed shut so they can never be reopened.”

“…when you're in love, all of your doors are open, and all of their doors are open. And you roller-skate down your halls together.”