Theo van Doesburg Quote

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: his article: 'Space – time and colour', in 'De Stijl' Aubette Issue, series xv, 87-9, 1928, pp. 26-27