"Now one does not think during creative work: any more than one thinks when driving a car. One has a background of years — learning — unlearning— success — failure — dreaming — thinking — experience — back it goes — farther back than one's ancestors: all this, — then the moment of creation, the focussing of all into the moment. So I can make — "without thought" — fifteen carefully-considered negatives one every fifteen minutes, — given material with as many possibilities."