Dada is able to mobilize the optical and dimensional static viewpoint which keeps us imprisoned in our [three-dimensional] illusions. Thus it became … - Theo van Doesburg

Gradually we began [ De Stijl-artists in The Netherlands, 1918] to present a closed front. By working there had been created not only a clarity in the collective consciousness of our group, but we had gained a certainty, which made it possible for us to define our collective attitude towards life and to perpetrate it according to the requirements of the period.. .As the world war [ World War I ] was coming to an end, we all came to feel the need of securing an interest in our efforts beyond the narrow boundaries of Holland.

True artistic experience is never passive, for the spectator is obliged to participate, as it were, in the continuous or discontinuous variations of proportions, positions, lines and planes. Moreover, he must see clearly how this play of repeated or non-repeated changes may give rise to a new harmony of relations which will constitute the unity of the work. Every part becomes organized into a whole with the other parts. All the parts contribute to the unity of the composition, none of them assuming a dominant place in the whole.

To be white, red, yellow, or black is to be a painter. Today it is not sufficient for the painter to think of colour; he should be colour, feed on colour and transform himself into painting. That is the essential thing. To feel like colour means to carry within oneself the entire range of colours, not as a treasure, but as a trust.