Who said "I have to keep going. That's what I do."?

This quote is attributed to Alex Murphy.

I have to keep going. That's what I do. - Alex Murphy

"I have to keep going. That's what I do."

Alex Murphy Perseverance

"I'm not going to kill you. I'm just going to hurt you really, really bad."

"Serve the public trust. Protect the innocent. Uphold the law."

"I can feel them. I can feel all of them."

"Dead or alive, you're coming with me."

"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."