If in this way you put three pebbles on the top of the pole and keep them, your missing rate of cicada catching will be around one out of ten only.

如果你照着上述的方式练习，竹竿上改放三粒石子而仍然维持不坠，那么，你捕蝉失误的机率就只有十分之一了。

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It is an amazing visual demonstration to watch someone put the big rocks in first, shake the pebbles, and then the sand around the rocks, and then pour the water in on top and have all four jars settle together.

FORBES: Level 5 Time Management: Beyond Stephen R. Covey and Ben Franklin