Castel is an archetype of the alienated, paranoid man [18]. His misanthropy is profound; he views the world with contempt, especially art critics and society at large. His life is a series of extensive rationalizations and anxieties , as he over-analyzes every interaction to the point of absurdity [3, 14]. The Metaphor of the Tunnel
The title itself is the novel’s central metaphor. Castel believes he is traveling through a lonely and dark tunnel , hermetically sealed off from the rest of society [14]. He briefly believes María Iribarne is a fellow traveler in a parallel tunnel who can truly understand him because she noticed a small, ignored detail in his painting Maternidad —a window looking out onto a lonely beach [2, 13]. El Tunel
A recurring theme is the absolute failure of language [3]. Castel’s obsession with linguistic subtleties—demonstrated by Sábato’s use of italicized segments and erratic capitalization—highlights his inability to bridge the gap between his internal reality and the outside world [3]. His paranoia stems from the fact that words are never enough to prove María’s devotion or transparency, leading him to draw pseudo-logical conclusions based on mere coincidence [14]. Existentialism and Comparative Analysis Castel is an archetype of the alienated, paranoid man [18]