In Heinlein's portrayal, the integration of man and machine allows Waldo to use his will and intelligence to overcome the limitations of his body. "He saw himself not as a crippled human being, but as something higher than human, the next step up, a being so superior as not to need the coarse, brutal strength of the smooth apes" (25). We see here a common theme in cyborg fiction: the idea that cyborgs will come to despise ordinary humans for their gross physicality. (This could provide an interesting footnote to the cultural history of the body.) However, the story is not, ultimately, a celebration of the cyborg state. Waldo is portrayed as embittered by his sense of physical inadequacy, and in the end he discovers a source of energy from a parallel universe that allows him to discard his mechanical aids in favor of his (newly-strengthened) biological body.