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.
In a letter to H. P. Bremmer, Paris 29 January 1914; ; as quoted in Mondrian, - The Art of Destruction, Carel Blotkamp, Reaktion Books LTD. London 2001, p. 81