One of the most significant literary uses of this title is the essay (A Stranger to Himself) by the Nobel laureate Octavio Paz .
Outside of specific titles, "El desconocido" is often the subject of sociological informative essays regarding the experience of migration and social isolation. El desconocido
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Paz explores the concept of the "heteronym"—Pessoa’s practice of writing under different identities with distinct biographies—describing the poet as someone eternally "dispersed" or "unknown" to even himself. "El soldado desconocido" by Salomón de la Selva El desconocido