Who said "We must never give up, no matter how hard life gets."?

This quote is attributed to Ricky Ricardo.

We must never give up, no matter how hard life gets. - Ricky Ricardo

"We must never give up, no matter how hard life gets."

Ricky Ricardo Perseverance

"Lucy, you got some 'splainin' to do!"

"I'm not angry, I'm just disappointed."

"Babalú!"

"This is going to be a great show!"

"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."