After receiving his doctorate in 1813 with his philosophical thesis On the fourfold root of the principle of sufficient reason, Arthur Schopenhauer dealt with science for a time, despite having it as a minor activity compared to art and even more so to philosophy. He did so as a result of his meeting with Johann Wolfgang von Goethe, who, after having read said doctoral thesis, became interested in the young philosopher, whom he introduced during 1814 and 1815 in his still recent Theory of Colors (1810), as well as in their observations and experiments in this regard. In those years they met on occasion and maintained a lively correspondence that became increasingly scarce after the publication of Schopenhauer's work, the result of all this: On vision and colors. Apparently Goethe was uncomfortable with the pretensions of the young philosopher to offer a theory that corrected his own and refuted the Newtonian heresy.