Forty-three is one of those chapters that encapsulates the Tao Te Ching nicely. It’s one that comes to mind when thinking about Taoism in general. In this very concise chapter, we have the idea of wei wu wei, along with the concepts of yin and yang, and also the idea of teaching without words.
While I was reading and meditating on this chapter, I focused on the idea of no-substance presented in the quote above. One might think of spirit or soul in the classical sense as something which has no substance in this way. At least we might see it as being nonphysical allowing it to be where there is “no room.” This ridiculous idea is very unappealing to me.
Instead, what came to mind when I was thinking about what this sentence might mean was the idea of a “string” in String Theory from modern physics. Oversimplifying horribly, string theory holds that all events in the physical world are ultimately caused by the various “vibrations” of extremely small multidimensional “strings.” One of the problems that opponents of this theory point to is the fact that if string theory is in fact true, because strings are actually smaller than the Planck length, we cannot observe them in any meaningful sense. The Planck length, or the smallest meaningful unit of length, is equal to 1.6 x 10-35 m or about 10-20 times the size of a proton. Our current understanding of the physical world cannot make claims about anything smaller than this unit of length. Therefore, opponents of string theory assert, the hypotheses of string theory are not falsifiable and as a result cannot be called scientific in any rigorous sense of that word. One could not prove string theory is wrong because the hypotheses associated with it cannot be tested. Therefore String Theory is more like an ideology than a scientific theory.
What in the hell does this have to do with chapter Forty-Three of the Tao Te Ching? Well, not much, except that when I think of things without “substance” in the usual sense, I don’t think about souls, I think about strings. If a string is smaller than the Planck distance then you could fit as many as you like “where there is no room.” Kind of like the old jab at the Scholastic philosophy of the Middle Ages, “How many angels can dance on the head of a pin?