I am quite aware that this road is obscured by mists that may pass over it from time to time. Yet these mists will be easily dispersed as soon as it is possible to employ widely the light of experiments. For Nature remains always the same; when she seems to be different it is because of the inevitable defects of our observations.

In: Johann Wolfgang von Goeth, The Botanical Writings (p. 30), University of Hawaii Press. 1952