Who said "Don't give up, even when it seems impossible."?

This quote is attributed to Dory.

Don't give up, even when it seems impossible. - Dory

"Don't give up, even when it seems impossible."

Dory Perseverance

"Just keep swimming, just keep swimming, what do we do? We swim, swim, swim!"

"I suffer from short-term memory loss."

"When life gets you down, you know what you gotta do? Just keep swimming."

"I'm sorry, what were we talking about?"

"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."