Who said "To face death, you must first understand it."?

This quote is attributed to Avengers Tony Stark.

To face death, you must first understand it. - Avengers Tony Stark

"To face death, you must first understand it."

Avengers Tony Stark Death

"I'm not a genius. I'm just a man in a suit."

"Sometimes you gotta run before you can walk."

"The world's always ending. The end of the line, the end of the road."

"I have a plan. Attack."

"Death doesn't scare me anymore."

"Death and I are old friends."

"Welcome to my world."

"Death is just the beginning."