Who said "Fear is the best teacher ever invented."?

This quote is attributed to Nelson Muntz.

Fear is the best teacher ever invented. - Nelson Muntz

"Fear is the best teacher ever invented."

Nelson Muntz Fear

"Ha-ha!"

"Your tears of unfathomable sadness!"

"I'm gonna enjoy this, Bart. I'm gonna enjoy this a lot."

"Eat my shorts, Simpson!"

"Face your fears with courage."

"You can't live your life in fear."

"Snakes. Why'd it have to be snakes?"

"Fear is just another obstacle to overcome."