Who said "He had become the enemy in her mind."?

This quote is attributed to Briony Tallis.

He had become the enemy in her mind. - Briony Tallis

"He had become the enemy in her mind."

Briony Tallis Fear

Character in Atonement

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"Forgiveness was a luxury she could not afford."

"Writing was the only way to atone."

"She could not undo what she had done."

"Writing is the truth of the imagination."

"Face your fears with courage."

"You can't live your life in fear."

"Snakes. Why'd it have to be snakes?"

"Fear is just another obstacle to overcome."