".....whenever the human being has found the slightest shelter: we shall see
the imagination built "walls" of impalpable shadows, comfort itself with the
illusion of protection-or, just the contrary, tremble behind thick walls,
mistrust the staunchest ramparts. In short, in the most interminable of
dialectics, the sheltered being gives perceptible limits to his shelter. He
experiences the house in its reality and in its virtuality, by means of
thought and dreams."

Gaston Bachelard