In this paper four conceptual trilogies are discussed as defining Cézanne’s contribution (Picasso called him “the father of all of us”) to modern art: i) the three aspects of the art work: what is seen, what is felt, what is painted, i.e., the three terms that according to Cézanne must correspond; ii) the three registers on which, also according to Cézanne, aesthetics should be established: sense, forms and forces; iii) the three operations by which we are moved and that sustain our art works: antagonism, homology and substitution; and iv) the three changes Cézanne realised: the inversion of space, the inversion of the Gestalt and the fusion of internal and external spaces.