Who said "You should be grateful."?

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

You should be grateful. - Iron Man (The Avengers)

"You should be grateful."

Iron Man (The Avengers) Gratitude

"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."

"Gratitude makes life richer."

"A grateful heart is a happy heart."

"Respect those who came before us."

"Life's greatest treasures are the people we love"