The character in Haruki Murakami's "Blind Willow, Sleeping Woman" reflects on the complexity of human emotions using the metaphor of a deep well. She suggests that, much like a well's unknown depths, the true nature of people's hearts is often hidden from view. This sentiment underscores the mystery surrounding individual experiences and feelings.

As she speaks, she implies that only fragments of a person's inner self become visible over time, leaving others to speculate about their true nature. This highlights the difficulty of truly understanding another person's feelings and thoughts, as we might only catch glimpses of their deeper emotional landscape through their expressions and actions.