有一個鞋匠單靠製鞋、修鞋已經難以維持生計，生活越來越貧困，於是決定改行，他開始裝成醫生在異鄉幫人看病。他出售一種解毒藥，聲稱可以解百毒，並用各種花言巧語來為自己招攬生意。人們相信了他的謊言，還把他稱為 “名醫 ”。他的生意越來越紅火。
很不幸，一次鞋匠自己得了重病。正好，他所在地方的國王想要實驗他的醫術。國王拿起一杯裝著水的杯子，對鞋匠說： “這裏麵摻著你自己的解毒藥，現在我把它賞賜給你喝。 ”貪生怕死的鞋匠馬上將自己賣假藥的事情和盤托出：他隻是靠人們的愚蠢贏得名譽的，根本沒有真才實學。國王馬上昭告臣民： “你們竟然如此放心地把自己的腦袋交給一個隻會做鞋子的人，你們不覺得自己都犯錯了嗎？ ”
一定要小心那些不熟悉自己業務的人。
A able to make a living by his trade ae by pan to practie in a toas not known. He s，pretending that it was ao all poisons，a name for himself by long-winded puffs as.
When the Cobbler happeo fall sick himself of a serious illhe Goverermi his skill. For this purpose he called for a d while .lling it reteo mix poison with the Cobbler’s antidote，anding him to drink it on the promise of a reward. The der the fear of death，fessed that he had no knowledge of medid was only made famous by the stupid clamors of the crowd. The Governor then called a public assembly ahe s，“Of what folly have you been guilty? You have o entrust your heads to a man，whom no oo make eveheir feet.”
Beware of those heir craft.