"What we hang on the wall as a painting is basically similar to the carved and painted pillars in an African hut. The African considers his idol the comprehensible form for an incomprehensible idea, the personification of an abstract concept. For us the painting is the comprehensible form for the obscure, incomprehensible conception of a diseased person, of an animal, of a plant, of the whole magic of nature, of the rhythmical." (Macke)