Who said "Some battles cannot be won. They can only be endured."?

This quote is attributed to Brienne.

Some battles cannot be won. They can only be endured. - Brienne

"Some battles cannot be won. They can only be endured."

Brienne Perseverance

"I am no one's daughter now. I will kill the men on my list."

"Nothing's worth nothing."

"I'm not a lady, I never have been."

"Renly was a good man. I would have died for him."

"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."