Who said "I'll keep fighting as long as there's breath in my body."?

This quote is attributed to Captain America.

I'll keep fighting as long as there's breath in my body. - Captain America

"I'll keep fighting as long as there's breath in my body."

Captain America Perseverance

"I can do this all day."

"When I first arrived at Camp Lehigh, I was just a scrawny kid from Brooklyn. But I learned that being a soldier isn't about size or strength."

"There are men laying down their lives. I got no right to do any less than them."

"I'm just a kid from Brooklyn. I can't do this."

"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."