The World as an Illusion

There can be no doubt that even with the most perfect mathematical knowledge of a movement process, I gain nothing that explains to me why this movement process appears as the color red. When one ball collides with another, we can—it seems—explain the direction of the second ball. We can mathematically specify what kind of movement arises from another. However, we cannot specify in this way how a particular movement produces the color red. We can only say: if this or that movement is present, this or that color is present. In this case, we can only describe a fact. So while we can explain what can be determined mathematically—in contrast, it seems, to mere description—we can only describe anything that eludes calculation.