Who said "I've learned that perfection is impossible."?

This quote is attributed to Bruce Banner (Age of Ultron).

I've learned that perfection is impossible. - Bruce Banner (Age of Ultron)

"I've learned that perfection is impossible."

Bruce Banner (Age of Ultron)

"I'm not a hero. I'm a scientist."

"The problem isn't that we need to be smarter. The problem is that we need to be better."

"I can't control it. When I get angry, everything changes."

"We create our own demons."