"Negation" is a poem from Wallace Stevens's first book of poetry, Harmonium.
The creator too is blind, Struggling toward his harmonious whole, Rejecting intermediate parts, Horrors and falsities and wrongs; Incapable master of all force, Too vague idealist, overwhelmed By an afflatus that persists.
For this, then, we endure brief lives, The evanescent symmetries From that meticulous potter's thumb.
This poem was Section VII of the poem—sequence "Lettres d'un Soldat" (1918).
Another Harmonium poem that clearly reflects Stevens's reading of Nietzsche is "The Surprises of the Superhuman", which was also extracted from "Lettres d'un Soldat" for inclusion in the second edition.