Who said "Gratitude is what separates the living from the dead."?

This quote is attributed to Black Widow.

Gratitude is what separates the living from the dead. - Black Widow

"Gratitude is what separates the living from the dead."

Black Widow Gratitude

"I'm not the only monster in the room."

"It's never too late to start over."

"We all have our secrets. The question is what we do with them."

"Family is complicated, but it's all we have."

"Gratitude makes life richer."

"A grateful heart is a happy heart."

"Respect those who came before us."

"Life's greatest treasures are the people we love"