Who said "Solitude is just another word for plotting revenge."?

This quote is attributed to Nelson Muntz.

Solitude is just another word for plotting revenge. - Nelson Muntz

"Solitude is just another word for plotting revenge."

Nelson Muntz Solitude

"Ha-ha!"

"Your tears of unfathomable sadness!"

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

"Eat my shorts, Simpson!"

"Sometimes being the best means being the loneliest."

"Solitude gives us time to reflect on what matters"

"I'm not good with people, never have been."

"I feel like I'm disappearing."