“Someone once said that marriage is like standing in a corridor lined with doors. You go off through your door, he goes through his, but at the end of the day you have to come back to the corridor, touch base, hold hands, because through every door are more doors, and beyond them, more again, and if you both go through too many without coming back to the corridor, you may never find your way back.”

“Through the doors of perception, down the corridors of uncertainty, and into the room of self doubt, opens the window of opportunity.”

“No back doors! I had a back door, but every fucker who thought he was bad wouldn't use the front door because everyone knows that if you're bad, you slip out through the back. I boarded it up - use the front door like everybody else.”

“Ghastly," continued Marvin, "it all is. Absolutely ghastly. Just don't even talk about it. Look at this door," he said, stepping through it. The irony circuits cut in to his voice modulator as he mimicked the style of the sales brochure. " 'All the doors in his spaceship have a cheerful and sunny disposition. It is their pleasure to open for you, and their satisfaction to close again with the knowledge of a job well done.' " As the door closed behind them it became apparent that it did indeed have a satisfied sighlike quality to it. "Hummmmmmmyummmmmmmah!" it said.”

“They're just beginning to open the doors in their minds""But once you've been through that door, you can't just keep going through it over and over again...”

“I followed Barry closely as we walked through the main doors of the hospital, down the corridor that smelt like disinfectant and false hope.”

“Didn't go in, just hovered outside like homeless person because (a) place was too small and Detta would have spotted me, and (b) once you're through doors of shop like that, if you try to leave without buying anything, they shoot you in the back with sniper's rifle.”