《论衡·卷十六·遭虎篇》
同是野物来临的征兆，但有吉有凶，同属一类的占验，却有升官有免职，都象征人去屋空，精神之气离开了人体。
夫吉凶同占，迁免一验，俱象空亡，精气消去也。
Though both are omens of the coming of wild beasts, one is auspicious and the other ominous. Though both belong to the same category of divinations, one indicates promotion and the other dismissal, both symbolize the house being empty of people, the spiritual energy has abandoned the human form.