16. Goethe as Thinker and Investigator

But this is, in fact, clear from the very beginning. If one investigates what is occurring in that which has extension in space, while the entities we are discussing are being communicated, then one must arrive at a homogeneous motion. For, a medium in which only motion is possible, must react to everything with motion. And all the communicating that it must take over, it will also accomplish with motion. If I then investigate the forms of this motion, I do not then experience what the communicated element is, but rather how it was brought to me. It is simply nonsense to say that heat or light are motion. Motion is only the reaction to light of a matter that is capable of motion.