I've never met a challenge I couldn't overcome. - Biff Tannen

"I've never met a challenge I couldn't overcome."

Biff Tannen Perseverance

More from Biff Tannen

"I'm your density. I mean, your destiny."

"Make like a tree and get outta here!"

"Nobody calls me chicken!"

"You're my favorite girl, McFly."

"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."