..When I have made some drawings I see them immediately in front of my eyes, enlarged [and] in colors..

In a letter (nr. 356) to Bastiaan Kist, 9 Sept. 1943; as cited in H. N. Werkman - Leven & Werk - 1882-1945, ed. A. de Vries, J. van der Spek, D. Sijens, M. Jansen; WBooks, Groninger Museum Stichting Werkman, 2015 (transl: Fons Heijnsbroek), p. 176