In Robert Kurson's book "Shadow Divers," the author explores the theme of self-discovery through struggle. He emphasizes that genuine learning about oneself often occurs during challenging moments rather than when life is easy. This insight suggests that facing hardships can reveal true character, as it is in those trying times that a person's resilience and essence come forward.

The quote highlights the idea that many individuals may never encounter such pivotal struggles. For the narrator, the experience of diving and unraveling a significant historical mystery becomes this defining moment. The challenge of confronting uncertainties in the underwater depths becomes a crucial reflection of his identity and aspirations.