Who said "I lost too much to give up now."?

This quote is attributed to Rick Grimes.

I lost too much to give up now. - Rick Grimes

"I lost too much to give up now."

Rick Grimes Perseverance

"We are the walking dead."

"This is not a democracy anymore."

"We don't kill the living."

"I'm not the same man I was before."

"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."