Aims to present an elucidation of the work of Heraclitus, a pre-Socratic philosopher as the author of "On Nature", the first sustained work of Greek prose. This book comprises two lecture courses delivered by the author at the University of Freiburg during the summers of 1943 and 1944.

Aims to present an elucidation of the work of Heraclitus, a pre-Socratic philosopher as the author of "On Nature", the first sustained work of Greek prose. This book comprises two lecture courses delivered by the author at the University of Freiburg during the summers of 1943 and 1944.