Excerpt from translator’s introduction:

… Picasso and Kandinsky make an interesting parallel, in that they have developed the art respectively of Cezanne and Gauguin, in a similar direction. On the decision of Picasso’s failure or success rests the distinction between Cezanne and Gauguin, the realist and the symbolist, the painter of externals and the painter of religious feeling. Unless a spiritual value is accorded to Cezanne’s work, unless he is believed to be a religious painter (and religious painters need not paint Madonnas), unless in fact he is paralleled closely with Gauguin, his follower Picasso cannot claim to stand, with Kandinsky, as a prophet of an art of spiritual harmony.