Who said "Sometimes you need to be alone to understand yourself."?

This quote is attributed to Avengers Tony Stark.

Sometimes you need to be alone to understand yourself. - Avengers Tony Stark

"Sometimes you need to be alone to understand yourself."

Avengers Tony Stark Solitude

"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."

"Sometimes being the best means being the loneliest."

"Solitude gives us time to reflect on what matters"

"I'm not good with people, never have been."

"I feel like I'm disappearing."