.. to challenge the objective nature of being. The notion of being is presented here as relative rather than irrefutable: it is merely a projection of our minds, a whim of our thinking. The mind has the right to establish being wherever it cares to and for as long as it likes. There is no intrinsic difference between being and fantasy.

Letter to Arnold Glimcher, quoted by Valery Oisteanu, Jean Dubuffet: The Last Two Years. The Brooklyn Rail, March 2012.