《史记·七十列传·范雎蔡泽列传》
天下的形势没有变化就罢了，一旦发生变化，给秦国造成祸患的还有谁能比韩国大呢？
天下无变则已，天下有变，其为秦患者孰大於韩乎？
If the situation in the world doesn't change, that's fine, but once it does change, who could cause greater trouble for the State of Qin than the State of Han?