A lot of people see doubt as legitimate philosophical posture. They think of themselves in the middle, whereas of course really, they're nowhere.

"Wives?' she asked, interrupting him. For a moment, he had assumed she was tuning to the novel. Then he saw her waiting, suspicious eyes, so he replied cautiously, 'None active,' as if wives were volcanoes."

John le Carré

"The vertical manThough we value noneBut the horizontal one."

John le Carré