Who said "It will be as though I never existed at all"?

This quote is attributed to Harry Potter.

It will be as though I never existed at all - Harry Potter

"It will be as though I never existed at all"

Harry Potter

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."