Describe symbolism in Goodbye, Darkness: A Memoir of the Pacific War by William Manchester

The memoir uses a metaphysical dream element to symbolize the author's internal conflict. Often, in later life, the author dreams of himself meeting a younger version of himself known as the sergeant. The younger man is the combat-centered soldier of World War II, caught in a time, place, and emotion of great significance to the author. In the book the sergeant represents the internal conflict of the survivor and ceases to visit the author's dreams after a series of healing and introspective visits to World War II battlefields.