The quote "You can't buy a clean conscience" from Jodi Picoult's book "Mercy" highlights the theme of morality and the weight of personal decisions. It suggests that no amount of wealth or material possessions can absolve someone from their actions or the guilt associated with them. This emphasizes the importance of integrity and ethical living, as true peace comes from one's choices rather than external validations.

Through this lens, Picoult invites readers to reflect on the complexities of human behavior and the consequences of our choices. The narrative challenges the notion that one can escape the repercussions of their past by seeking redemption through superficial means. It asserts that genuine redemption requires self-reflection and understanding, rather than simply offering compensation for misdeeds.