The Heart Is a Lonely Hunter is all about conversation. In fact, the entire novel is structured around people talking to each other (or trying to talk to each other), and revealing their inner selves (or trying to). The fact that the central character is a deaf mute, though, shows us just how problematic communication can be, especially for characters who have trouble finding their words, or characters who speak differently. The characters in this book are a group of misfits who try to express themselves and struggle to get others to understand them. But in the end, many of them fail.
All the characters in the novel are chronically unable to express themselves or understand others.
None of the characters want actual friends; instead, they want exactly what they get in Singer – a silent, non-judgmental listener, a sort of living diary they can confide in.