Lines, opposites and unity
"The point, then, is that lines join the opposites as well as distinguish them. And that precisely is the essence and function of all real lines and surfaces in nature. They explicitly mark off the opposites while at the same time time they implicitly unify them. For example, let's draw the line representing a concave figure, as follows:
concave ) (convex)
But notice immediately that with the very same line I have also created a convex figure. This is what the Taoist sage Lao Tzu meant when he said that all opposites arise simultaneously and mutually." (p.25)
Wilber, K. (2001) No Boundary, Eastern and Western Approaches to Personal Growth. Boston: Shambhala.
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