"There are two kinds of middle, static and dynamic. There is the abstract middle, or centre, that part of a structure which is equidistant from all bounding edges. Then there is the more dynamic kind of middling or mediation, which consists in a movement towards the middle, which never comes to reside there. The line which runs down the centre of an opening in a book divides it into two, but does not belong to the space of the page, since there is no part of the page that does not belong to the recto or the verso. The dynamism of the middle arises when the middle of the page is folded into the middle of one of the spaces it divides off, which then creates two more halves, and another middle into which the centre may be drawn. This kind of middling is always on the hop, an unbalanced attempt to re-topple itself into balance."