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In page Paul Cézanne:

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Cézanne preferred to use these terms when describing his painting process. First of all, there is the "motif", by which he not only meant the representational concept of the picture, but also the motivation for his tireless work of observing and painting. Aller sur le motif, as he called his approach to work, therefore meant entering into a relationship with an external object that moved the artist inwardly and that had to be translated into a picture.[citation needed]