What lesson can be learned from Lucie Manette's influence or love?

[user41]

In what way does Lucie Manette influence the following characters?

- Doctor Manette
- Carton
- Darnay
- Mr. Lorry

And, what lesson can be learned from this?
Or, if influence doesn't work then what lesson can be learned from her love?

[Jurt]

Lucie influenced Carton very much to my mind even if the affect only appeared at the end of the book. The influence's intensity can be seen at the last sentence: "It is a far, far better thing that I do, than I have ever done; it is a far, far better rest that I go to, than I have ever known". Due to Lucie's acquaintance with Carton he was enabled to do such good deed as he did. To have a better notion of this influence take a butcher to the scene in which they have the discussion.