What was Paul Cezanne particularly concerned with?

Answer 1

He seeks to combine classical rules of realism with a modern sense of feeling. He thought he did not really succeed, but generations of artists have found a point of departure for them in his work.
He was not an impressionist. The important thing is that he developed painting from Impressionism and further.

Answer 2

In his own words: "I want to make of impressionism something solid and lasting like the art in the museums".

Answer 3

Order and composition (APEX)