Who said "You can't undo the past. You can only move forward."?

This quote is attributed to Black Widow / Natasha Romanoff.

You can't undo the past. You can only move forward. - Black Widow / Natasha Romanoff

"You can't undo the past. You can only move forward."

Black Widow / Natasha Romanoff Life

"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."

"Life is meant to be lived with passion."

"Life is what happens when you're busy making other plans."

"Life is a journey, not a destination."

"Life's too short for regrets."