Who said "I shouldn't be alive, but I am."?

This quote is attributed to Tony Stark.

I shouldn't be alive, but I am. - Tony Stark

"I shouldn't be alive, but I am."

Tony Stark Gratitude

"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."

"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"