In Jodi Picoult's book "House Rules," the author reflects on the limitations of the human heart by comparing it to a shelf. This metaphor suggests that just like a shelf can only hold a certain amount of items before it becomes overloaded, a person's emotional capacity has its own restrictions. When faced with too many burdens or feelings, individuals may eventually reach a breaking point, leading to loss or disappointment.

The quote emphasizes the fragility of human emotions and the experience of dealing with life's challenges. It resonates with the idea that while we may strive to accommodate various emotions or responsibilities, there comes a time when we must confront the consequences of an overflowing heart. Picking up the pieces after such experiences showcases the resilience required to move forward.