Who said "I'm not a very good teacher, am I?"?

This quote is attributed to Gilderoy Lockhart.

I'm not a very good teacher, am I? - Gilderoy Lockhart

"I'm not a very good teacher, am I?"

Gilderoy Lockhart Truth

Character in Harry Potter and the Chamber of Secrets

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"Magical ability is a supreme gift."

"Fame is a fickle friend."

"Gilderoy Lockhart never fails to deliver."

"Memory charm gone wrong."

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."