Who said "The past is the past. What matters is what you do now."?

This quote is attributed to Black Widow / Natasha Romanoff.

The past is the past. What matters is what you do now. - Black Widow / Natasha Romanoff

"The past is the past. What matters is what you do now."

Black Widow / Natasha Romanoff Change

"I used to have nothing. Then I got this job, this team. It's all I have."

"Compromise where you can. Where you can't, don't."

"I'm always picking up after you boys."

"The world doesn't change without sacrifice."

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."