Who said "Perseverance is simply refusal to accept defeat."?

This quote is attributed to Zemo.

Perseverance is simply refusal to accept defeat. - Zemo

"Perseverance is simply refusal to accept defeat."

Zemo Perseverance

"The world has always belonged to the powerful. We just had to remind everyone."

"Bucky Barnes was a weapon. Now he is free. That is what matters."

"You cannot build a new world without breaking the old one."

"Empathy is a tool, nothing more. Use it wisely."

"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."