"Everything he paints is a search, a self-development, a striving for understanding of the most profound kind. He is still experimenting, not executing, he often paints two or three pictures in a day, and his sketchbooks are already innumerable. He lives in a continuous, sharp criticism of his work and is thus constantly changing and developing. He has, by nature, absolutely no interest in the transcendental. His sensitivity is elemental and deep. He experiences – I would say – those many moments of ecstasy, the alternation between the greatest happiness and the deepest depression, which are the lot of a great artist, who must learn the whole gamut of feeling from his own experience."