The quote from John Cheever reflects a persistent belief in the idea that physical manifestations, such as tics and involuntary movements, can reveal a person's inner moral failings. This notion suggests that someone with a "crooked heart," or a morally corrupt character, cannot hide their true nature, as it will eventually show through these physical signs.

Cheever's exploration of human nature in his stories often delves into the complexities of morality and the hidden aspects of people's lives. The idea that one's internal state can manifest externally serves as a compelling theme in understanding human behavior and the contradictions within it.