《吕氏春秋·论·贵直论》
戎王被捉以前，不可能使他知道将会被捉；就是被捉以后，自己还睡在梦中，仍然不知道已经被捉。
未禽则不可知，已禽则又不知。
Before the King of Rong was captured, there was no way for him to know that he would be captured. Even after he was captured, he was still asleep and unaware that he had been taken prisoner.