In "Mountain of Black Glass" by Tad Williams, the idea is presented that every individual perceives themselves as the protagonist of their own life story. This perspective highlights the unique journey each person embarks on, emphasizing personal experiences and aspirations that shape their identity. The narrative reflects on how individuals interpret their actions and decisions, often placing themselves at the center of their own narratives.

The quote "Every man is the hero of his own song" encapsulates this theme, suggesting that everyone views their life through a heroic lens, complete with struggles and triumphs. This notion encourages readers to appreciate the complexity of human experiences, acknowledging that each person has their own story, filled with challenges and victories, that contributes to their sense of self and purpose.