Who said "Believe in yourself, even when nobody else does."?

This quote is attributed to Luigi.

Believe in yourself, even when nobody else does. - Luigi

"Believe in yourself, even when nobody else does."

Luigi Inspiration

"It's-a me, Luigi!"

"Mamma mia!"

"Let's-a-go!"

"I'm-a scared, but I'm-a going anyway!"

"The best part of living is knowing you survived."

"The world needs heroes."

"Life is too short to live poorly."

"I'd rather be an optimist and be wrong than a pessimist and be right"