Who said "The monster is still out there."?

This quote is attributed to Harry Potter.

The monster is still out there. - Harry Potter

"The monster is still out there."

Harry Potter Adventure

Character in Harry Potter and the Chamber of Secrets

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"Ghosts don't eat, Nearly Headless Nick."

"I'm not going home tonight."

"True courage means facing what terrifies you most."

"I have nothing to be ashamed of."

"The greatest adventure is life itself."

"The adventure of life begins with a single step."

"Adventure finds you when you stop running."

"Fortune and glory, kid."