A form must be of its own time if it is to be recognized: one cannot relate to what one is not or does not have – Thus all that is of the past is to be rejected.
note in one of his Paris sketchbooks; as quoted in Two Mondrian sketchbooks 1912 - 1914, ed. Robert P. Welsh & J. M. Joosten, Amsterdam 1969 op. cit. (note 31), p. 44