事有必至，理有固然

Explanation: Things are bound to happen, the truth would have on the case. That no matter how certain things to prevent, or to appear, this is something inherent in accordance with the development of the law, is not changed. 　　Source: Qing Wu Xuan, "Biography of the dragon," the twenty-ninth back: "Tell me what we have known, will never have to do, there is reasonable doubt."