How can one survive the concentration camps? How can one keep living after Auschwitz and Mauthausen? How can an individual recover? By forgetting, talking, shouting, creating? Sixty years after the Liberation, four figures of the second half of the 20th century remember. Stéphane Hessel, Pierre Daix, Armand Gatti, and Serge Silberman faced the Nazis' humiliations and horrors almost to the point of death when they were 20 years old. They all rebuilt their lives when they got back, by pursuing their passions: the former communist activist Daix whose arts publications are influential (for example, the one about his friend Picasso). Hessel, the 93 years old diplomat who became the iconic author of Indignez-vous!, famous among young people. Gatti, son of a sweeper, who became a prolific theater writer during the post-war. Silberman, who survived the ghetto and became a visionary producer in the 60s; he produced Melville, Bunuel, Kurosawa. They all tell with decency what they kept quiet for a long time. Even if their paths are different, they often use the same words to talk about the unthinkable concentration camps' world. They express with an incredible strength their desire to survive, even if they still repress the indescribable they have been through. All their lives they fought for free speech and against minds' servitude.