In Barry’s speech, he uses metaphors in several instances. The use of metaphors as a rhetorical device develops the theme of uncertainty. As his process is developed, metaphors appear left and right. Barry describes the scientific process by using example of the world around him; in order to become one of the best, to usurp uncertainty, they must look beyond the natural conventions and “a single step can take them through the looking glass into a world that seems entirely difference” (Barry). The contrast of events between those that exist and those that do not exist is apparent. The metaphors used in this essay provoke themes and illuminate ideas other cannot comprehend; the uncertainty of man is that of a shovel in Barry’s eyes. As a “shovel
