David Goggins's Never Finished recounts his life story, emphasizing his relentless pursuit of self-improvement and overcoming adversity. The book details his challenging childhood, his journey to becoming a Navy SEAL, and his subsequent achievements in ultra-endurance events. Goggins stresses the importance of mental toughness, resilience, and pushing past perceived limitations. He shares his methods for achieving peak physical and mental performance, including his unique approach to self-talk and the development of an alter ego. The book's structure incorporates "Evolutions," sections offering practical strategies for overcoming obstacles and achieving personal growth.