16. Goethe as Thinker and Investigator

In order that something founded in the being of nature may come to manifestation, the necessary prerequisite is that a causal opportunity, an organ, be present in which this something can present itself. The eternal, iron laws of nature would, in fact, hold sway even if they never presented themselves within a human spirit, but their manifestation as such would not then be possible. They would then be present merely in essence and not in manifestation. This would also be the case with the world of light and colour if no perceiving eye confronted them. Colour, in its essential being, cannot be traced back in Schopenhauer's manner to the eye; but the possibility for colour to manifest must very definitely be shown to lie within the eye. The colour is not conditional upon the eye, but the eye is the cause of its manifestation.