This article, divided into three sections, explores the key role of Lógos in the philosophy of Heraclitus of Ephesus. Heraclitus, known by the epithet of “The Obscure” is presented in the first section as a fontal thinker. The second part focuses on the etymology of the word lógos highlighting the word’s original meaning in the light of Heidegger’s comments in Fragments 50 and 16 about “ Lógos” and “ Alétheia.” The second part focuses on the importance of the original meaning of Lógos in considerations on the phynai in Physis, as understood by Greek philosophers. The third section discusses how Heraclitus employs the doctrine of Lógos to redefine his view of the human psyche that was prevalent in Ancient Greece.
Heraclitus of Ephesus; Lógos and Lógos of the human psyche