Who said "Courage is not the absence of fear, but mastery over it."?

This quote is attributed to Whiplash.

Courage is not the absence of fear, but mastery over it. - Whiplash

"Courage is not the absence of fear, but mastery over it."

Whiplash Courage

"I build things, I build weapons, I build better versions of what already exists."

"You think you're the only one who can play with lightning?"

"I know who I am. I'm the guy who builds better tech than you."

"Revenge is a dish best served with electricity."

"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."