Perhaps it was his return to Paris [In June 1919 Piet Mondrian returned to Paris] that was needed to provide him with fresh new possibilities in his work. Invigoration. His most recent work is without composition. The division of the picture plane is modular. That means ordinary rectangles, all the same size. The only contrast is in the colour. In my view, this runs counter to his theory concerning the abolition of position and dimension. This is in effect equality of position and dimension.

quote from his letter to the Dutch modern architect Oud, 24 June 1919; as quoted in 'Mondrian, -The Art of Destruction', Carel Blotkamp, Reaktion Books LTD. London 2001, p. 126