Picture the tallest point of a roof in a storm. A thin metal rod stands there on purpose, with a wire running all the way down into the ground. When the strike comes, it does not get pushed away — it is invited. The rod is the easiest path, so everything goes through it, and the house underneath is untouched. Hold two parts of that picture: the strike lands on one small place, and the thing it lands on was not the cause of the storm.
可以想成暴風雨中屋頂的最高點。那裡故意立著一根細細的金屬桿，接著一條線一路通到地底。雷打下來的時候，它不是被擋開的，而是被請上去的。桿子是最好走的一條路，所以電全部從它身上過，底下的房子毫髮無傷。這個畫面有兩個要記住的地方：所有的力量都集中在一個小點上，而那個小點並不是暴風雨的起因。
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