„My choice of colors does not rest on any scientific theory; it is based on observation, on feeling, on the very nature of each experience. I…. merely try to find a color that will fit my sensation. There is an impelling proportion of tones that can induce me to change the shape of a figure or to transform my composition. Until I have achieved this proportion in all the parts of the composition I strive towards it and keep on working. Then a moment comes when every part has found its definite relationship, and from then on it would be impossible for me to add a stroke to my picture without having to paint it all over again.“

— Henri Matisse

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„There is an impelling proportion of tones that may lead me to change the shape of a figure or to transform my composition. Until I have achieved this proportion in all the parts of a composition I strive towards it and keep on working. Then a moment comes when all the parts have found their definite relationships, and from then on it would be impossible for me to add a stroke to my picture without having to repaint it entirely.“
— Henri Matisse
„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“
— Henri Matisse
„Expression for me does not reside in passions glowing in a human face or manifested by violent movement. The entire arrangement of my picture is expressive; the place occupied by my figures, the empty space around them, the proportions, everything has its share. Composition is the art of arranging in a decorative manner the diverse elements at the painter's command to express his feelings. In a picture every part will be visible and will play its appointed role, whether it be principal or secondary. Everything that is not useful in the picture is, it follows, harmful. A work of art must be harmonious in its entirety: any superfluous detail would replace some other essential detail in the mind of the spectator.“
— Henri Matisse
„But there is one very odd thing - to notice that basically a picture doesn't change, that the first 'vision' remains almost intact, in spite of appearances. I often ponder on a light and a dark when I have put them into a painting; I try hard to break them up by interpolating a color that will create a different effect. When the work is photographed, I note that what I put in to correct my first vision has disappeared, and that, after all, the photographic image corresponds with my first vision before the transformation I insisted on.“
— Pablo Picasso
„Color is one of the great things in the world that makes life worth living to me and as I have come to think of painting it is my effort to create an equivalent with paint color for the world – life as I see it.“
— Georgia O'Keeffe