《汉书·表·异姓诸侯王表》
镌刻金石者难以成功，摧枯拉朽者易为着力，形势使然。
镌金石者难为功，摧枯朽者易为力，其势然也。
It is difficult to succeed in engraving gold and stone, but it is easy to destroy the rotten and pull down the withered, as the situation requires.