We speak of concrete and not abstract painting because nothing is more concrete, more real than a line, a colour, a surface. [quote of Van Doesburg, … - Theo van Doesburg

The problem which Mondrian undertook to solve in nr. 116 [a new painting of Mondrian, exhibited in a group-exhibition in the Stedelijk Museum in 1915 in Amsterdam] was handled very successfully. This work spiritually dominates all others. It gives the impression of Repose; the repose of the soul. Its predetermined structure embodies 'becoming' rather than 'being'. This represents a true element in art, for art is not 'being', but 'becoming'. The idea of 'becoming' has been expressed in black and white.. ..Through years of hard work my own experiences have led me, before I came to know the theories of Uexkuell or Picasso, to prefer the use of the white-black-grey palette in works of a purely spiritual content...

..a demand which will never be fulfilled as long as artists use individualistic means. 'Unity can only result from disciplining the means, for it is this discipline which produces more generalized means'. The objectification of the means will lead towards elementary, monumental plastic expression. It would be ridiculous to maintain that none of this relates to creative activity. If that were true, art would not be subject to logical discipline.

But the projects with which the architects of Russian proletarian architecture present us are not only based on pure imagination, but their construction would, if they were fitted for realization, entail enormous waste of space and materials. The dwelling complex 'Wolkenbügel' [architecture, designed by Lissitzky, with the help of [ w:Emil Roth - Swiss architect, 1924] (assuming that one could live here without either freezing or melting!), shaped like a 4, stands in a very un-constructive way on three legs in which the elevators are located. The latter take up as much space as would one or more skyscrapers. And these 'architects' are to teach the West what architecture is!