Who said "What you believe about yourself matters most."?

This quote is attributed to Lightning McQueen.

What you believe about yourself matters most. - Lightning McQueen

"What you believe about yourself matters most."

Lightning McQueen Philosophy

"I'm Lightning McQueen. I'm a race car."

"Ka-chow!"

"I'm not just a race car, I'm a Lightning McQueen."

"Life is a journey, not just a race to the finish line."

"I've seen the worst humanity has to offer."

"Sometimes I wonder if the world is worth saving."

"Every choice shapes our destiny."

"Order is the foundation of a good life."