Who said "In darkness and in light, we are bound together"?

This quote is attributed to Lucie Manette.

In darkness and in light, we are bound together - Lucie Manette

"In darkness and in light, we are bound together"

Lucie Manette

Character in A Tale of Two Cities

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"I would ask you, dearest, to have the goodness to think often of the friend who is so much in your thoughts"

"But, indeed, when I sum up my life, I find little to be proud of except my trust"

"I am not going to be made unhappy by your news"

"It is a privilege to live and work for others"