Who said "The real struggle isn't external; it's internal."?

This quote is attributed to Tony Stark / Iron Man.

The real struggle isn't external; it's internal. - Tony Stark / Iron Man

"The real struggle isn't external; it's internal."

Tony Stark / Iron Man Philosophy

"I am Iron Man."

"Genius, billionaire, playboy, philanthropist."

"If you're nothing without the suit, then you shouldn't have it."

"The difference between you and me? I'm not afraid."

"I've seen the worst humanity has to offer."

"Sometimes I wonder if the world is worth saving."

"Every choice shapes our destiny."

"Order is the foundation of a good life."