《吕氏春秋·论·似顺论》
很多事物都是好象如此其实并不如此，很多人也是似乎很聪明其实并不聪明，所以国家被灭亡、百姓被杀戮的事情才接连不断地发生。药草有莘有藟，单独服用会致死，合在一起服用却会益寿。
物多类然而不然，故亡国僇民无已。夫草有莘有藟，独食之则杀人，合而食之则益寿。
Many things seem to be one way but are not, and many people seem to be clever but are not, which is why countries are destroyed and people are killed all the time. The herbs and are both lethal when consumed individually but lead to longevity when taken together.