Who said "You can't win if you don't believe you can."?

This quote is attributed to Mario.

You can't win if you don't believe you can. - Mario

"You can't win if you don't believe you can."

Mario Motivation

"It's-a me, Mario!"

"Let's-a-go!"

"Mamma mia!"

"I'm not giving up on my brother."

"I believe in working hard for what you want."

"Never underestimate the power of determination."

"I don't need a reason to fight."

"The most important thing is the mission. Nothing else matters."