《汉书·志·天文志》
出现而且位置高，进军深入则吉，不深入则凶；位低下，不深入则吉，深入则凶。
出而高，用兵深吉浅凶；埤，浅吉深凶。
It appears and is high, it is good to advance deep, but it is fierce if it does not go deep; it is low, it is good not to go deep, but it is fierce to go deep.