Fernando Pessoa (1888-1935) was a preeminent Portuguese poet, writer, literary critic, translator, publisher, and philosopher, recognized as one of the most significant literary figures of the 20th century. Born in Lisbon, Pessoa's genius manifested itself through various 'heteronyms' – alternative authorial personas with distinct biographies, temperaments, philosophies, and writing styles. This technique allowed him to explore different facets of his intellect and creativity, giving rise to a diverse and complex oeuvre. His work is often characterized by its existential themes, metaphysical inquiries, and a lyrical exploration of anguish and identity. Among his most celebrated English-written works sits '35 Sonnets', first published in 1918, which showcases the rich introspective landscape and linguistic precision Pessoa was known for. These sonnets, written under his own name rather than a heteronym, highlight his mastery in the English language and illustrate a deep influence of the English literary canon, particularly that of Shakespeare and the metaphysical poets. Pessoa's profound influence on the Portuguese literary scene is evident in works such as 'The Book of Disquiet' and 'Message,' but it is in '35 Sonnets' that we witness the interplay of his bilingual prowess and his existential ruminations. His legacy continues to be celebrated worldwide for its intellectual depth and its innovation in style and form.