Who said "Weaklings cry, winners laugh and push harder."?

This quote is attributed to Nelson Muntz.

Weaklings cry, winners laugh and push harder. - Nelson Muntz

"Weaklings cry, winners laugh and push harder."

Nelson Muntz Strength

"Ha-ha!"

"Your tears of unfathomable sadness!"

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

"Eat my shorts, Simpson!"

"Strength comes from within."

"A woman should be proud of who she is."

"A strong woman can overcome anything."

"The only thing I'm good at is killing."