..art and life are no longer separate domains.. .The word 'art' no longer has anything to say to us. In place of that, we [=De Stijl-artists ] insist… - Theo van Doesburg

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.

In all these products, whether iron bridges, locomotives, automobiles, telescopes, cottages, airport-hangars, funicular railways, skyscrapers, or children's toys, the will towards a new style expresses itself. The similarity of these examples to the new creations in art consists in the same striving for clear, pure form which expresses truth in the objects.

Plastic expression in architecture is inconceivable without colour. Colour and light complete one another. Without colour architecture is expressionless, blind.. .If the Functionalists wish to suppress colour completely, then this merely proves that they never understood the importance of colour as an ‘architectural’ element, as a means of plastic expression, no matter whether used with iron, glass, or concrete.