In chapter six of A Tale of Two Cities, Charles Dickens sets the hopeful tone of Lucie and Dr. Manette's relationship by illustrating the struggle between light and dark. He writes, “ ‘You can bear a little more light?’ ‘I must bear it, if you let it in’ “(Dickens 30). In this quote and paragraph, Dickens explains how Dr.Manette has been locked away for eighteen and isn't familiar with the light anymore. Lucie is the one to let the light into her father's prisoner room and expose it to him. Lucie is the light that is there to fight the darkness within her father. The author illustrates how darkness has surrounded Dr. Manette by stating, “Darkness had fallen on him in its place”(Dickens 32). After being held prisoner for years, Dr.Manette grew to be surrounded by darkness and learned to adapt to it. He needs someone to bring the light to him because he can't do it on his own. Lucie, the daughter he has just found out exists, is the one who lets the light into his life once again. Dickens writes, “Then, as the darkness closed in, the daughter laid her head down on the hard ground close to the father's side, and watched him. The darkness deepened and deepened, as they both lay quiet, until a light gleamed through the chinks of the wall”(Dickens 36). This shows how Lucie carries along the light with her and the light battles the darkness that has taken over her father. Lucie carries the light with her and uses it to heal her father and pull him away from the darkness of being in prison for eighteen years.  In chapter six, Dickens writes about the constant struggle between light and dark, within the father and daughter to create hope.