Who said "I've learned that patience is harder than fighting."?

This quote is attributed to Avengers Tony Stark.

I've learned that patience is harder than fighting. - Avengers Tony Stark

"I've learned that patience is harder than fighting."

Avengers Tony Stark Patience

"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."

"Patience is a virtue I'm still learning."

"I may be a redhead, but I'm not a hothead."

"Patience is a virtue."

"Patience is a virtue I never learned."