A Tale of Two Cities is full of examples of sacrifice, on both a personal and national level. Dr. Manette sacrifices his freedom in order to preserve his integrity. Charles sacrifices his family wealth and heritage in order to live a life free of guilt for his family's awful behavior. The French people are willing to sacrifice their own lives to free themselves from tyranny. In each case, Dickens suggests that, while painful in the short term, sacrifice leads to future strength and happiness. Dr. Manette is reunited with his daughter and gains a position of power in the French Revolution because of his earlier incarceration in the Bastille. Charles wins the love of Lucie. And France, Dickens suggests at the end of the novel, will emerge from its terrible and bloody revolution to a future of peace and prosperity.
Yet none of these sacrifices can match the most important sacrifice in the novel—Sydney Carton's decision to sacrifice his life in order to save the lives of Lucie, Charles, and their family. The other characters' actions fit into the secular definition of "sacrifice," in which a person gives something up for noble reasons. Carton's sacrifice fits the Christian definition of the word. In Christianity, God sacrifices his son Jesus in order to redeem mankind from sin. Carton's sacrifice breaks the grip of fate and history that holds Charles, Lucie, Dr. Manette, and even, as the novel suggests, the revolutionaries.