“Evidence ... proves that prohibition only drives drunkenness behind closed doors and into dark places, and it does not cure it or even diminish it.”

“Reading is a private pursuit; one that takes place behind closed doors.”

“he looked around at the books on the walls, at their dark, worn spines, and he seemed to hear a strange, distant murmur coming from them. each of the closed books was a door, and behind it stirred shadows, voices, sounds, heading toward him from a deep, dark place.”

“A verbal promise behind closed doors, even a statement written on paper-these could easily evaporate . . . .”

“Many investigators feel uneasy stating in public that the origin of life is a mystery, even though behind closed doors they admit they are baffled.”

“Sometimes I have the feeling that we're in one room with two opposite doors and each of us holds the handle of one door, one of us flicks an eyelash and the other is already behind his door, and now the first one has but to utter a word ad immediately the second one has closed his door behind him and can no longer be seen. He's sure to open the door again for it's a room which perhaps one cannot leave. If only the first one were not precisely like the second, if he were calm, if he would only pretend not to look at the other, if he slowly set the room in order as though it were a room like any other; but instead he does exactly the same as the other at his door, sometimes even both are behind the doors and the the beautiful room is empty.”