Who said "Keep fighting even when victory seems impossible."?

This quote is attributed to Meathead.

Keep fighting even when victory seems impossible. - Meathead

"Keep fighting even when victory seems impossible."

Meathead Perseverance

"You gotta understand the dialectical materialism of the situation, Archie"

"Love is a beautiful thing, man, it's like the revolution of the heart"

"Education is the key to enlightenment and social change"

"Peace will come when we stop perpetuating the military-industrial complex"

"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."