"I believe that new art must differ totally in its manifestation from art as we know it, and people may be very reluctant to accept this. It is perhaps true to say, as someone did of cubism, that 'To sum up: since art is a need to create rather than imitate, the 'cubists' rousing themselves from the sentimentality born of the picturesque aspect of some natural spectacle or other, disengage the fleeting aspects from those which are constant and absolute, and with the aid of these two elements, construct a reality equivalent to that which they see before them'. Thus it is a question of finding the true equivalence , and this can only be 'that which is not nature at all, and is nonetheless one with nature ."

“later Quote of Mondrian, about his 1890's; taken from 'Mondrian, Essays' by Piet Mondrian; Wittenborn-Schultz Inc., New York, 1945, p. 10; as cited in De Stijl 1917-1931 - The Dutch Contribution to Modern Art, by H.L.C. Jaffé; J.M. Meulenhoff, Amsterdam 1956, p. 39”

“To show that this end is only a beginning, it is essential that.. ..the series of galleries be followed by a room in which painting and sculpture will be realized by the interior itself.. ..demonstrating that what is lost for art is gained for life. This room could therefore be designed for use as a lecture room, a restaurant.. ..as a bar with an American jazz band.”

“However, new plasticism is pure painting : the means of expression still are form and color, though these are completely interiorized; the straight line and flat color remain purely pictorial means of expression.”

“It was during this early period of experiment that I first went to Paris. The time was around 1910 when Cubism was in its beginnings. I admired Matisse, Van Dongen and the other Fauves, but I was immediately drawn to the Cubists, especially to Picasso and Léger. Of all the abstractionists I felt that only the Cubists had discovered the right path; and, for a time, I was much influenced by them.”

“Culture produces relative consciousness of the changeable expression of reality. When this consciousness is attained, a revolt takes place: the beginning of the deliverance from that expression of reality. Destruction of its limitation follows. The culture of the intuitive faculties has conquered. A clearer perception of constant reality is possible. A new realism appears.”

“..the elements of form have a particular aspect; every fragment, every plane, every line has its proper character.”