He [Jan Toorop, an older and famous Dutch religious painter] sees the Catholic faith as A. Besant, [a British Theosophiste and women's right activiste, then] views it in its primeval period: the Catholic religion as it was originally, is the same as Theosophy, is it not? I remained broadly in agreement with Toorop, and I could tell that he goes to the depths, and that he is searching for the spiritual.

In a letter to Cornelis Spoor, Domburg October 1910; Van Ginneken and Joosten, op. cit. (note 26), pp. 263; as quoted in Mondrian, - The Art of Destruction, Carel Blotkamp, Reaktion Books LTD. London 2001, p. 47.