"Misericordia" is a novel by the outstanding Spanish writer Benito Perez Galdos, which tells a story of great love and sacrifice. The main character, Margarita, sincerely believes in goodness and mercy, and thanks to her merciful nature, she is able to change even the most cruel hearts. In this novel, the author uses the motives of religion, morality and humanism, showing that every person has the power of true mercy. "Misericordia" is a work that leaves a deep impression and makes you think about important aspects of human nature and morality.