Who said "The difference between you and me is that I'm not afraid."?

This quote is attributed to Tony Stark.

The difference between you and me is that I'm not afraid. - Tony Stark

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

Tony Stark Fear

"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."

"Face your fears with courage."

"You can't live your life in fear."

"Snakes. Why'd it have to be snakes?"

"Fear is just another obstacle to overcome."