Who said "My imagination is thinking of new insults."?

This quote is attributed to Nelson Muntz.

My imagination is thinking of new insults. - Nelson Muntz

"My imagination is thinking of new insults."

Nelson Muntz Imagination

"Ha-ha!"

"Your tears of unfathomable sadness!"

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

"Eat my shorts, Simpson!"

"Imagination is more powerful than knowledge."

"The world is full of wonders if you know where to look."

"You have the imagination of a child, Lucy"

"The world is full of mysteries waiting to be solved."