Fundamental to visual and intuitive literacy is understanding the basic prin-ciples visual communicators use to inform, inspire, and persuade bothour conscious and nonconscious minds. These principles derive from within and without — from within through the basic structures of matter and life, and from without through millennia of human cultivation of symbol systems. The 3rd-century BCE mathematician Euclid laid the geometrical framework for many of the theories and visualizations that bridge science, math, and art today.