郑人买履 郑人有且置履者，先自度其足，而置之其坐。 至之市而忘操之。已得履，乃曰：“吾忘持度。” 反归取之。及反，市罢，遂不得履。人曰： “何不试之以足？” 曰“宁信度，无自信也。” A man from zheng is going to buy some shoes, first he measures his own feet then puts and puts the ruler on a seat. Heading off to the market he had forgot to take it along. On taking the shoes, he said " I've forgotten to bring my ruler" He went back to get it. When he arrived back in the market he found all the stalls had closed so he wouldn't be able to get his shoes. A fellow said "why don't you just see if they fit your feet?" To which he replied " I'd rather believe in measurements than in myself."