Robert Motherwell, in a catalog note to the show Black or White (1950)
Misattributed
“As the thought comes to me to exorcise and transform this black with a white drawing, it has already become a surface... Now I have lost all fear, and begin to draw on the black surface.”
Hans Arp's quote on drawing on the black surface; as quoted in Search for the Real, Hans Hofmann, Addison Gallery of modern Art, 1948
1940s
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Hans Arp 42
Alsatian, sculptor, painter, poet and abstract artist 1886–1966Related quotes
Robert Motherwell, partly quoting Jean Arp, in Motherwell & black (1981) p. 94 -->
Misattributed

note from his postcard, late May 1943; as quoted in Mondrian, - The Art of Destruction, Carel Blotkamp, Reaktion Books LTD. London 2001, p. 240
1940's

Vol. I, Ch. 25, Section 2, pg. 687.
(Buch I) (1867)
Unless they're suffocating - then help'em.
Just For Laughs: On The Edge - 2002

Seeing
The Note-Books of Samuel Butler (1912), Part IX - A Painter's Views on Painting

Quote in Macke's letter to philosopher de:Eberhard Grisebach, March 1913; as quoted by de:Wolf-Dieter Dube, in Expressionism; Praeger Publishers, New York, 1973, p. 145

Source: 1930s, On my Painting (1938), pp. 13-14

This was the method followed by Euclid, who, fortunately for us, never dreamed of a geometry of triangles, as distinguished from a geometry of circles, or a separate application of the arithmetics of addition and subtraction; but made one help out the other as he best could.
The Differential and Integral Calculus (1836)

“I have said that black has it all. White too. Their beauty is absolute. It is the perfect harmony.”
As quoted in Chanel (1987) by Jean Leymarie
Context: Women think of all colors except the absence of color. I have said that black has it all. White too. Their beauty is absolute. It is the perfect harmony.