A Tale Of Two Cities Light vs. Dark

In a tale of two cities Charles Dickens uses darkness and light to the set the time of hopefulness in Dr.Manettes and Lucy's relationship. "... a little more light here. You can bear a little more?(Dickens 30)". In this quote Dr.Mannete is being asked if it is ok to let a little more light into the room he is in. Before he was sitting in darkness which in my opinion symbolizes his time in prison when he was depressed. The light they are letting in I think is a symbol of hope or in other words Lucy his daughter who is there to free her farther from his depressed state. In other words she is the light at the end of the tunnel. My next quote "darkness had fallen on him in its place (Dickens 32)" also uses darkness to represent Dr.Manettes past. This quote shows how bad his lonely years in jail were and how those were dark times for him. "On her fair young face that looked as though she passed like a moving light(Dickens 32). This last quote is describing Dr. Manettes savor, his daughter. Lucy is compared with light to show how he is looking to her even though he hardly knows her to help him  get out of the darkness which he seems sure to do. Throughout the first moments of their relationship light and darkness is being used to give the tone of hope.