《论衡·卷七·道虚篇》
所以吃药物能除百病，即令身体轻了气壮了，恢复了他原来的特性，又怎么能延年益寿甚至于成仙呢？
故夫服食药物除百病，令身轻气长，复其本性，安能延年至於度世？
Therefore, taking medicine can remove all diseases, that is, the body is lighter and the energy is stronger, restoring its original characteristics. How can it prolong life and even become immortal?