Nandini read the closing chapter of Last Chance To See when she was young. She confesses that she didn't understand it then, but does so now. Read her thoughts (and the chapter itself) at her blog Nandini's Niche.
There's a story I heard when I was young that bothered me because I couldn't understand it. It was many years before I discovered it to be the story of the Sybilline books. By that time all the details of the story had rewritten themselves in my mind, but the essentials were still the same. After a year of exploring some of the endangered environments of the world, I think I finally understand it.