Hannah Arendt and Karl Jaspers - two outstanding personalities in the history of philosophy in the 20th century, one primarily a political thinker, the other originally a doctor and psychologist, who both had to cope with the shocks of the world and their personal lives caused by National Socialism and World War II but always remained facing the world. They left behind many important writings, approaches whose relevance has not diminished to this day. Much has been written and researched about both - just their very deep and special, almost lifelong friendship, starting with Arendt's studies with Jaspers from 1926, has so far been strangely unexplored . Although the extensive correspondence has been edited, there is not a single monograph on the subject. This book aims to remedy this situation. Ingeborg Gleichauf, philosopher and writer, approaches the relationship between Arendt and Jaspers by dealing with the big questions and topics that haunted the two of them throughout their lives and focuses on the long-term and long-distance conversation between them, whether in person or in letters - to the fruitful, sometimes controversial, always trusting exchange characterized by curiosity, openness and honesty.