Who said "Never give up. That's the only rule that matters."?

This quote is attributed to Gamora.

Never give up. That's the only rule that matters. - Gamora

"Never give up. That's the only rule that matters."

Gamora Perseverance

"I am vengeance. I am the night. I am... Gamora."

"Just because someone stumbles and loses their way doesn't mean they're lost forever."

"We have to be willing to make sacrifices for those we love."

"I've been broken before. I know how to put myself back together."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."