As an art critic, he campaigned on behalf of the great gods nearest to his heart he sang the praises of Auguste Rodin, Claude Monet, Camille Pissarro, Paul Cézanne, Paul Gauguin, Auguste Renoir, Félix Vallotton, and Pierre Bonnard, and was an early advocate of Vincent van Gogh, Camille Claudel, Aristide Maillol, and Maurice Utrillo (cf.