When he arrived at the market, he found many shoes he liked, however he discovered he had forgotten the size. Turning to the shopkeeper he blurted out, "Hold these shoes for me, I'll be right back." Then he turned on his heel and bolted off for home. By the time he had arrived back at the market after collecting his measurements he found all the shoes having been sold. So he didn't managed to buy his shoes.
A person standing next to him, having heard this story, curiously asked, "Why didn't you use your feet and try them on ?"
To this he earnestly replied, "I'd rather trust the measurements than my own feet."
If you trust and follow strictly inflexible rules to accomplish a goal, often they will lead to further trouble and even failure. We should always be aware that most of the time there are more than one method to reach a goal, we should be more flexible in implementing such methods.
If you're interested in having your own Chinese Tales Book, I recommend "Tales of a Chinese Grandmother: 30 Traditional Tales from China" I'm sure it will be the right choice.