Who said "You'll never know what you're capable of until you try."?

This quote is attributed to Harry Potter.

You'll never know what you're capable of until you try. - Harry Potter

"You'll never know what you're capable of until you try."

Harry Potter Courage

"I'm not going back there."

"I didn't know I was a wizard until I got your letter."

"I think I can be brave."

"It's our choices that show what we truly are, far more than our abilities."

"Never let fear stop you from chasing your dreams."

"Courage is being afraid but doing it anyway."

"Sometimes you gotta do what you gotta do."

"Sometimes you have to be the monster to stop the monsters."