Learn by heart the forms to be found in nature, so that you can use them like the notes in a musical composition. That is what these forms are for. Nature is a marvelous chaos, and it is our job and our duty to bring order into that chaos and – to perfect it.

In: his lecture 'Drei Briefe an eine Malerin' ('Three letters to a Woman-painter'), New York and Boston, Spring 1948; as quoted in Letters of the great artists – from Blake to Pollock, Richard Friedenthal, Thames and Hudson, London, 1963, p. 214