The interlock of space and mass is the crux of architecture.

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• Interlock of space and massconcept0.833
  The three-dimensional intertwining of structural solid elements and spatial voids such that each defines and strengthens the other.
• The building as a whole, its feeling, will largely hinge on the way in which it is a beautiful, pure pattern in which solid elements and open elements, volumes, spaces, voids, and solid cores of material, together form a satisfying pattern of centers.quote0.788
  The core aesthetic principle driving the structural design process.
• Deep interlock and ambiguity appear in systems that maximize surface area or allow dual belonging, e.g., cerebellum, magnetic domains, molecular bonds.claim0.780
• It is, indeed, this pattern of the middle-sized entities, which most strongly gives overall geometric order to the building. Without it, a building is very unlikely to be beautiful.claim0.771
  Identifies the pattern of middle-range entities as the primary source of overall geometric order and beauty
• Space is a material whose most important feature is its capacity to form centers.claim0.769
  Reiteration of a key premise from Book 1 within the new metaphysical framework.
• The core of architecture is that whatever is made is always the simplest thing consistent with its necessities of feeling and continuous attention to feeling while it evolves into form.claim0.765
  Opening declaration of the chapter, synthesizing the essence of living architecture.
• It is the space which comes to life. All that we do, as architects, is then to arrange and rearrange this living space, in such a way as to intensify its life.claim0.764
  Synthetic statement that architecture is the art of awakening space.
• Architecture can be understood as a sequence of local symmetry-creation in which each new symmetry intensifies the feeling of the whole.claim0.758