Who said "I have nothing to prove to you."?

This quote is attributed to Iron Man (The Avengers).

I have nothing to prove to you. - Iron Man (The Avengers)

"I have nothing to prove to you."

Iron Man (The Avengers)

"I am Iron Man."

"Genius, billionaire, playboy, philanthropist."

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

"I've successfully privatized world peace."