Who said "They say that what doesn't kill you makes you stronger."?

This quote is attributed to Tony Stark.

They say that what doesn't kill you makes you stronger. - Tony Stark

"They say that what doesn't kill you makes you stronger."

Tony Stark Courage

"I am Iron Man."

"Genius, billionaire, playboy, philanthropist."

"Sometimes you gotta run before you can walk."

"I'm not saying I'm Batman. I'm just saying nobody's ever seen me and Batman in the same room."

"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."