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In page Paul Cézanne:

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Sensation is another key term in Cézanne's vocabulary. First of all, he meant visual perception in the sense of "impression", i.e. an optical sensory stimulus emanating from the object. At the same time, it includes the emotion as a psychological reaction to what is perceived. Cézanne expressly did not place the object to be depicted at the center of his painterly efforts, but rather the sensation: "Painting from nature does not mean copying the object, it means realizing its sensations." The medium that mediated between things and sensations was the colour, although Cézanne left it open to what extent it arises from things or is an abstraction of his vision.[citation needed]