In "Faces" by Martina Cole, the quote "Tell the truth and shame the Devil" emphasizes the importance of honesty in the face of difficult circumstances. The phrase suggests that being truthful can expose wrongdoing and bring accountability, which is crucial in a world where deceit often prevails. This idea resonates throughout the narrative, where characters grapple with the consequences of their actions and the impact of their decisions on their lives and relationships.

The book explores themes of morality, integrity, and the struggle between good and evil. By encouraging readers to embrace truthfulness, Cole highlights how it can lead to redemption and personal growth. The characters in "Faces" illustrate the complexities of navigating their choices, reminding us of the weight that honesty carries in human interactions and the moral dilemmas we face in society.