For the next four years he lived at Dresden. In 1816 he published an essay _On Vision and Colours_, which has reference to the controversy which Goethe was waging on the theory of light. Schopenhauer's theory is fantastic. It is not submitted to experimental evidence, and rests, as he admits, on "intuitive" certainty. This early work is hardly in the direct line of the development of Schopenhauer's thought. It is really a deviation, for which Goethe's all-compelling influence is responsible. Goethe was at first inclined to regard Schopenhauer as an opponent, for the essay is rather a transformation of Goethe's theory than an expansion of it. His residence at Dresden was the best he could have chosen from the point of view of his own system of philosophy. Here he could study better than in almost any other town of Europe the works of art, in which he was to see a revelation of the meaning of life. The art collections of the town are among the most famous in Europe, and the music, both operatic and orchestral, was then, as now, of the highest quality. In this home of art, Schopenhauer's great system was now taking shape. During his daily walks along the banks of the Elbe, he was thinking out his theories, making notes occasionally in a note-book, and then striding on again {24} with the rapid pace by which he was recognised even as an old man. More and more strongly it was borne in upon him that "inward discord is the very law of human nature." All his life his thoughts had struck the note of genuine pessimism. He was always in revolt against the pain and misery that lie hidden beneath the surface of life. That this pessimistic bias was fundamentally one of temperament, there can be no doubt. In letters to him from his mother, we find her constantly urging him, even as a child, to look upon the brighter side of things. In a letter written to him in 1806, she writes, "I could tell you things that would make your hair stand on end, but I refrain, for I know how you love to brood over human misery in any case." Even in happiness and success he recognised illusion. Everywhere in nature we see strife and conflict. One species preys upon another. The "will to live" necessarily expresses itself as a struggle. Hegel at this time reigned supreme in the kingdom of philosophy. It was hardly possible to escape his influence. Schopenhauer, in striving to give expression to a system which would lay bare the real inner nature of our life and destiny, was at the same time protesting passionately against the Hegelian view. It was as a protest against the all-powerful idealism of this philosophy that his system was directed in the first place. He represents a reaction against the absorption of everything in reason. As opposed to this view, Schopenhauer urged the priority of the will and the feelings as the fundamental factors in determining the mental life.