We speak of concrete and not abstract painting because nothing is more concrete, more real than a line, a colour, a surface. [quote of Van Doesburg, c. 1925]. Theo van Doesburg
Abstract painting is abstract. It confronts you. There was a reviewer a while back who wrote that my pictures didn't have any beginning or any end. He didn't mean it as a compliment, but it was. Jackson Pollock
The concept of Abstract painting is not a passing abstraction, good only for a few initiates, [but] the total expression of a new generation whose necessities it experiences and to all of whose aspirations it constitutes a response. Fernand Léger
The failure of abstract painting is due to the confusion that exists in the understanding of primitive art [as well as that] concerning the nature of abstraction. Barnett Newman
An abstract painting will react to you if you react to it. You get from it what you bring to it. It will meet you half way but no further. It is alive if you are. It represents something and so do you. YOU, SIR, ARE A SPACE, TOO. Ad Reinhardt
I was worried in the '80s that the best abstract painting had become obsessed with materiality, and painterly gestures and materiality were up against the wall. Frank Stella