The one object of fifty years of abstract art is to present art-as-art and as nothing else, to make it into the one thing it is only, separating and defining it more and more, making it purer and emptier, more absolute and exclusive – non-objective, non-representational, non-figurative, non-imagist, non-expressionist, non-subjective. The only and one way to say what abstract art or art-as-art is, is to say what it is not.

p. 154 - 'Art-as-Art Dogma' part II, (1964)