Who said "We do what we have to do, and then we do more."?

This quote is attributed to Rick Grimes.

We do what we have to do, and then we do more. - Rick Grimes

"We do what we have to do, and then we do more."

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."