Who said "I've realized that happiness is possible, even for me."?

This quote is attributed to Black Widow (MCU).

I've realized that happiness is possible, even for me. - Black Widow (MCU)

"I've realized that happiness is possible, even for me."

Black Widow (MCU) Happiness

"I've been red in my ledger for a long time. I'm trying to wipe it out."

"Sometimes you need to go back in order to move forward."

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

"You really think you can hold onto the cube? It has a lot of voltage."

"Babalú!"

"My greatest joy is making people smile."

"Laughter and love make a home."

"The best things in life are free."