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… - Theo van Doesburg

Only a radical cleaning of social and artistic life as, in the domain of art, is already done by Dada, which is anti-sentimental and healthy to the core, since it is anti-art. Only unscrupulously striking down any systematically bred amateurism in any field, can prepare civilization for the 'New Vision's happiness which is greatly and purely alive in a dew people.

The new architecture considers not only space, but also time to be an architectural value. The unity of space and time will give architecture a new form of appearance, which is more complete. This is what is meant by 'active space'.. ..the dissimilar space-cells develop eccentrically from the center to the borders of the cube, thereby granting a new plastic quality to the dimensions of height, width, depth, and time.

We speak of concrete and not abstract painting because nothing is more concrete, more real then a line, a colour, a surface. A woman, a tree, a cow; are these concrete elements in a painting? No. A woman, a tree and a cow are concrete only in nature; in painting they are abstract, illusionistic, vague and speculative. However, a plane is a plane, a line is a line and no more or no less than that. 'Concrete paintin'. Spirit has arrived at the age of maturity...