"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."
Theo van Doesburg was a Dutch painter, writer, poet, and architect. He is best known as the founder and leader of De Stijl.
"Piet Mondrian realizes the importance of line. The line has almost become a work of art in itself; one can not play with it when the representation of objects perceived was all-important. The white canvas is almost solemn. Each superfluous line, each wrongly placed line, any color placed without veneration or care, can spoil everything – that is, the spiritual."
Theo van Doesburg"European art [however] has developed from mimetic-ism and only today is arriving at an elementary plastic art."
Theo van Doesburg"For – to say a few words on technique – whereas the curved line was used predominantly for reasons of beauty, (Phidias, Michelangelo, Raphael, Rubens) it has been used more and more economically for reasons of truth (Millet, Claude Monet, Paul Cézanne) until it will end as the straight line for reasons of Love. This will enable the art of the future to create an international form; a form understandable to all and vital enough to the expression of a general feeling of love in a monumental way. Such is the future."
Theo van Doesburg"..modern destruction begins where architectural structure is opened up and set into motion by colour relationships. The colour-planes, however, are always in orthogonal relationship."
Theo van Doesburg"However, Man as the appearance of utmost internality, of spirit, does not possess any point in front, at the side or the back, no fixed point at all towards which he could define a dimension. This explains why in expressing the spiritual, in making spirit an artifact, he will be forced to a moto-stereometric form of expression. This moto-stereometric form of expression represents the appearance of a 4-n dimensional world in a world of three dimensions."
Theo van Doesburg"[ Futurisms] ..superficial expression of velocity, the aeroplane, the racing-car and so on, is but a weak expression of the inner velocity of thought compared to which the velocity of radium represents nothing but inertia.. .The mimetic expression of velocity (whatever its form may be: the aeroplane, the automobile, and so on) is diametrically opposed to the character of painting, the supreme origin of which is to be found in inner life."
Theo van Doesburg