Quote 1
"O Miss Manette, when the little picture of a happy father's face looks up in yours, when you see your own bright beauty springing up anew at your feet, think now and then that there is a man who would give his life, to keep a life you love beside you!" (2.13.49)
Sydney Carton, certain that his solitary (and unhappy) life could never include Lucie, imagines instead a happy family life for her.
Quote 2
"I see that I hold a sanctuary in their hearts, and in the hearts of their descendants, generations hence." (3.15.48)
Sydney Carton, unable to gain Lucie’s love in this lifetime, settles for the epic loyalties that he imagines her family bestowing upon him in the future.
Quote 3
"I see him winning it so well, that my name is made illustrious there by the light of his. I see the blots I threw upon it, faded away." (3.15.49)
Sydney’s loyalties seem to be for everyone but himself. Even his name will be better when it belongs to someone else.