It may be noted that in Neo-Plastic art the crucial thing is the right angel, that is, the right-angle lines. And not whether the position of the lin… - Piet Mondrian

Neo-Plasticism has its roots in Cubism. It could just as easy be called the Painting of Real Abstraction. Since the abstract can be expressed by a plastic reality.. .It achieves what all painting has tried to achieve but has been able to express only in a veiled manner. By their position and their dimension as well as by the importance of given to colour, the coloured planes express in a plastic way only relations and not forms. Neo-Plasticism imparts to these relations an aesthetic balance and thereby expresses universal harmony.. .For the moment what art had discovered must still be limited to art itself. Our environment cannot yet be realized as a creation of pure harmony. Art today is at the very point formerly occupied by religion. In its deepest meaning art was the transposition of the natural [into another plane]; in practice it always sought to achieve harmony between man and untransposed nature. Generally speaking, so do Theosophy and Anthroposophy, although these already possessed the original symbol of balance. And this is why they never were able to achieve equivalent relations, that is to say true harmony.

And finally I must tell you that I was influenced [in Paris, c. 1912/13] by seeing the work of Picasso, whom I 'greatly' admire. I am not ashamed to speak of his influence, for I believe that it is better to be receptive to correction than to be satisfied with one's own imperfection, and to think that one is O so original! Just as so many painters think. And besides, I am surely totally different from Picasso, as one is generally wont to say.

Quote in a letter of 7 March 1917 to H. P. Bremmer; as cited in Mondrian, -The Art of Destruction, Carel Blotkamp, Reaktion Books LTD. London 2001, p. 91