The paper aims to discuss the relationship between reason and desire by observing the irrational view of
sexual desire shown in John Steinbeck’s works. Interestingly, the four sexuality-themed stories of the
writer’s collection, The Long Valley, symbolically demonstrate the conflict between the desire existing
unconsciously and the reason called the social norms. “The Chrysanthemums” and “The Snake” delineate
the aspect that breaks the wall of the rational, while the protagonists of “The White Quail” and “The
Harness” do unnatural acts because their sexual drives are oppressed too much by the power of reason.
Through this analysis, the phenomena appearing in the bodies and, if not, transfigured into other mental
actions demonstrate that the negative effects remain in the unconsciousness. Also, this tendency even seems
to show the chance leading to post-modernist literature prevalent after the writer’s era. However, the
continuous theme without change, although new genres and experiments occur, is that the relation of
dynamics between the sexual desire and the reason is not likely to keep its balance.