Heraclitus is the first English translation of Volume 55 of Martin Heidegger's Gesamtausgabe. This important volume consists of two lecture courses given by Heidegger at the University of Freiburg over the Summers of 1943 and 1944, each of which concerns itself, in a thoroughgoing and insightful way, with the thought of Heraclitus. These lectures shed important light on Heidegger's understanding of Greek thinking, as well as his understanding...