His image to casual art fans is that of a reclusive, provincial bumpkin who somehow made good in terms of Modernist Establishment art history. There is some truth in this, but there was more to Cézanne than that. In the first place, he had a good pre-university classical education, being able to translate from the Latin, for instance. He was a close boyhood friend of Émile Zola, later the famous journalist and novelist. His artistic potential caught the eye of Camille Pissarro, a leading French Impressionist, who joined him on plein air painting expeditions.
At his core, Cézanne can be considered a theorist, especially where art was concerned. He theorized about color, perspective, brushwork, the basic nature of forms and other matters that became important to the likes of Pablo Picasso, Georges Braque, Henri Matisse and other modernists who claimed that he had opened their eyes in various ways.
One thing Cézanne didn't much bother with was accurate drawing, especially of people -- something he must have considered incidental to his theory-based artistic goals. Or perhaps he didn't much bother with accurate drawing because he has limited ability in that task. Let's examine some evidence.
So it seems that Cézanne was almost incapable of painting people properly proportioned. Now let's see what happens where painting and all his theories are stripped away and the focus is on depicting human form.