《淮南子·说林训》
三寸长的竹管如果没有底，那么天下再多的粮食也无法填满它；十石大的容器如果有底，那么一百斗粮食就可以盛满它。
三寸之管而无当，天下弗能满；十石而有塞，百斗而足矣。
If a three-inch bamboo tube has no bottom, then no amount of grain in the world can fill it. If a ten-stone container has a bottom, then it can be filled with a hundred buckets of grain. 