A building that is one mile by ten miles has the same proportions as a buiding that is 2 meters by 20 meters. Scale comes into play when we relate dimensions to the human body. In the Modulor, Corb took an ancient system of proportions and anchored it to a scale. Dave Thompson talks about this on his Modulor site. The Powers of Ten journey involves astronomy, biology, particle physics, and much more, but though it concerns all of these, ultimately it is about scale.
Scale is an remarkably useful way to organize information and experience.