16. Goethe as Thinker and Investigator

Here is where colour theory must therefore take its start. It must investigate the eye, must disclose its nature. This is why Goethe places physiological colour theory at the beginning. But even there his conception is essentially different from what one usually understands this part of optics to be. He does not want to explain the functions of the eye by its structure, but wants rather to observe the eye under various conditions in order to arrive at a knowledge of its capacities and abilities. Here also his procedure is essentially an observational one. What happens when light and darkness act upon the eye; what happens when defined images enter into relationship with it, etc.? He does not ask, to begin with, what processes occur within the eye when one or another perception comes about, but rather he seeks to fathom what can come about through the eye in the living act of seeing. For his purpose, that is to begin with the only important question. That other question does not belong, strictly speaking, to the realm of physiological colour theory, but rather to the science of the human organism, i.e., to general physiology. Goethe has to do with the eye only insofar as it sees, and not with the explanation of seeing that comes from the perceptions we can have of the dead eye.