In Henry James' "What Maisie Knew," the metaphor of life as a long corridor filled with closed doors captures the complexity of existence. It suggests that behind every door lies potential experiences, secrets, and truths that remain hidden from view. This reflects how individuals often navigate their lives without full access to understanding or clarity about their circumstances or the motivations of those around them.

The imagery of closed doors evokes a sense of mystery and anticipation, as each door represents an unknown possibility. It emphasizes the idea that life is not always straightforward; instead, it requires exploration and the courage to confront the unknown. Ultimately, this idea resonates with the themes of discovery and the quest for insight that are central to the novel.