what is Sydney's final promise to Lucie? Explain what he envisions in the near future.

One day he visits her and she asks him what the matter is. He claims that he is beyond help in his profligate ways, but he says his familiarity with the Manettes' family scene has given him the desire to be a good man again. Lucie tries to convince him that this is a possibility, but Carton declares that it is only a dream, however happy. He merely wants to open his heart to her and have her remember that he did so. Before he leaves he promises that he would do anything for her or for anyone close to her.