李卓吾先生批評西遊記 (Journey to the West), Vol. 8

All other weapons are not worth mentioning; only my rake is the most direct. What difficulty is there in seizing victory in a duel? Why speak of merit? I fear not your copper head or iron skull; with a body of steel, my rake everywhere

The Pilgrim heard this and withdrew his iron staff, saying, "You blockhead, do not boast. Old Sun will place his head there. You try striking it once and see if you can make me dissipate my energy." The monster really raised his rake and struck with all his might. With a thud, sparks flew from the teeth of the rake, but it did not move a single hair on his head. He was so terrified that his hands went numb and his feet went weak, exclaiming, "Good head, good head!" The Pilgrim said, "You are also ignorant. Old Sun, because I caused trouble in the Heavenly Palace, stole the immortal pills, pilfered the peaches, and swiped the imperial wine, I was captured by the Lesser Saint Erlang and held before the Douniu Palace. The heavenly gods chopped me with axes, hammered me, cut me with swords, stabbed me with spears, burned me with fire, and struck me with lightning, but they could not damage me in the slightest. Then that Tai..."