Who said "She could not undo what she had done."?

This quote is attributed to Briony Tallis.

She could not undo what she had done. - Briony Tallis

"She could not undo what she had done."

Briony Tallis

Character in Atonement

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"Forgiveness was a luxury she could not afford."

"Writing was the only way to atone."

"Writing is the truth of the imagination."

"Writing allowed her to control the narrative."