..modern destruction begins where architectural structure is opened up and set into motion by colour relationships. The colour-planes, however, are a… - Theo van Doesburg

I would like to offer an illustration. Imagine a house which is well designed from a material or practical point of view .. .Apart from these physio-functional demands, there are also psycho-functional demands which correspond with our optical, phonetic and tactile experiences. Until now, mankind has attempted to satisfy these 'supra-material' demands with a painting on the wall or a sculpture in a room.. ..the architecture of the future will have to destroy this duality. Its task will be to express completely and fulfill all our demands.

After having passed through the various phases of plastic creation [the phases of arrangement, composition, and construction] I have arrived at the creation of 'universal forms' through constructing upon an arithmetical basis with the pure elements of painting.

The plastic expression of space is inconceivable without light. Light and space complete one another. In architecture light represents an element of plastic expression – in fact, the most important one. An organic relationship between 'space' and 'material' is possible only with the aid of light. The highest achievements in architecture can be accomplished only if light also is treated as plastic form.