Who said "I've learned that revenge is a poison you drink yourself."?

This quote is attributed to Natasha Romanoff.

I've learned that revenge is a poison you drink yourself. - Natasha Romanoff

"I've learned that revenge is a poison you drink yourself."

Natasha Romanoff Wisdom

"I'm not going to fight you."

"Sometimes the best way to solve your own problems is to help someone else."

"I have a very specific skill set."

"You know, I'm actually a very good liar."

"I'm not angry, I'm just disappointed."

"The best things in life are free."

"You can't have everything in life, but you can have what matters most."

"A woman's intuition is rarely wrong."