Who said "I'm persevering in my quest for total superiority."?

This quote is attributed to Cartman.

I'm persevering in my quest for total superiority. - Cartman

"I'm persevering in my quest for total superiority."

Cartman Perseverance

"Screw you guys, I'm going home!"

"I'm not fat, I'm just big-boned!"

"You will respect my authority!"

"Hippies, they're everywhere!"

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."