There is no house or interior without a door or windows

In order to constitute the space of a habitable house and a home, you also need an opening, a door and windows, you have to give up a passage to the outside world [l'etrangerl. There is no house or interior without a door or windows. The monad of home has to be hospitable in order to be ipse, itself at home, habitable at-home in the relation of the self to itself.

Jacques Derrida, Of Hospitality (Stanford University Press, 2000) p. 61