16. Goethe as Thinker and Investigator

A truth results from this, however, that is qualified to shed light upon the entire theoretical foundation of physics and physiology. What do I experience from the investigation of a thing caught up in a process that appears in my consciousness as sensation? I experience no more than the way that thing responds to the action which issues from the sensation, or, in other words the way a sensation expresses itself in some object or other of the spatial-temporal world. It is far from the truth to regard such a spatial-temporal process as the cause, as that which causes the sensation in me; something quite different is the correct view: The spatial-temporal process is the effect of the sensation within a thing that has extension in space and time. I could insert as many things as I wanted into the path from the stimulator to the organ of perception: only that will occur in each one of them that can occur in it by virtue of its nature. But it is still the sensation, therefore, that expresses itself in all these processes.