I am forced to transpose until finally my picture may seem completely changed when, after successive modifications, the red has succeeded the green as the dominant color. I cannot copy nature in a servile way, I must interpret nature and submit it to the spirit of the picture – when I have found the relationship of all the tones the result must be a living harmony of tones, a harmony not unlike that of a musical composition

p. 411 - 'Notes d'un Peintre', (Notes of a Painter), H. Matisse (1908)