From "Testament of tactics and directions of Mao"

"There is no higher authority that can influence and counter Mao's perspective. Marxism cannot limit Mao, Soviets cannot limit Mao, Chinese Communist Party cannot limit Mao. No one can point out Mao's mistakes, because he is the final judge of what is right and what is wrong"

-Yan Chiu

I hope I do a better job of translation than google translate.