Viktor Frankl, a Viennese psychiatrist who survived Auschwitz, Dachau, and other Nazi concentration camps, draws on his experiences to develop a psychological approach centered on meaning rather than pleasure or power. The book's first section describes his observations of how prisoners responded to the camps' extreme conditions, noting that those who maintained a sense of purpose--whether completing a scientific work, reuniting with loved ones, or helping fellow prisoners--showed greater resilience than those who lost all sense of meaning. Frankl emerged from the camps having lost his wife, parents, and brother, yet convinced that human beings can find meaning even in unavoidable suffering. The second section outlines logotherapy, the therapeutic approach Frankl developed based on this insight, which helps patients identify sources of meaning in their lives through creativity, experience, and attitude toward suffering. Unlike psychoanalysis's focus on the past or behaviorism's focus on conditioning, logotherapy orients patients toward future purposes and responsibilities. The book has sold millions of copies and influenced countless readers facing their own struggles, offering neither false hope nor nihilistic despair but a demanding vision of human dignity and responsibility. Readers will find here not abstract philosophy but hard-won wisdom from someone who faced the worst humanity could inflict and found reasons to affirm life.