If you attempt what is beyond your power, your trouble will be wasted and you court not only misfortune but ridicule.
如果你想做些超出自己能力范围之外的事，不但徒劳无功，还会给自己带来不幸和世人的嘲笑。
 
One day a Jackdaw saw an Engle swoop down on a lamb and carry it off in its talons. “My word, ”said the Jackdaw, “I’ll do that myself.” xiaogushi8.com So it flew high up into the air, and then came shooting down with a great whirring of wings on to the back of a big ram. It had no sooner alighted than its claws got caught fast in the wool, and nothing it could do was of any use: there it stuck, flapping away, and only making things worse instead of better. By and by up came the Shepherd. “Oho, ” he said, “so that’s what you’d be doing, is it?” And he took the Jackdaw, and clipped its wings and carried it home to his children. It looked so odd that they didn’t know what to make of it. “What sort of bird is it, father?” they asked. “It’s a Jackdaw, ” he replied, “and nothing but a Jackdaw: but it wants to be taken for an Eagle.”

　　译文：
有一天，一只寒鸦看到老鹰从高岩上直飞而下，抓起一只羊羔就飞走了。“我的天呀，” 寒鸦说，“我也要试试。”于是，他飞上高空，接着又扑腾着翅膀冲下来，扑通一声猛扑到一只公羊背上。刚一飞下来，它的爪子就被羊毛缠住了，无论如何也拔不出来。尽管他使劲拍打着翅膀，可仍然被卡在那里，不但于事无补，反倒更加糟糕了。不久，牧羊人走过来了。“哦”他说，“这就是你想做的事情，是吗?”