"And then about whether or not to work from a given in nature. In my view, you define this in a rather narrow sense. In the main, I do agree with you that the destruction of the natural, and it reconstruction, must be accomplished according to a spiritual image, but I believe that we should take a broad view here. What is natural does not have to be a representation of something. I'm now working on a thing that is a reconstruction of a starry sky and yet I'm making it without a given from nature. Someone who says he uses a theme from nature can be right, but also someone who says he uses nothing at all."

“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.”

“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.”

“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.”

“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.”