《太平广记·卷八十五·异人五》
实上，最高的道术并不烦琐，神仙的妙方最为简易，当今人们不是以为炼丹所用的药多么贵重，就是把炼丹技术看得如何艰难，都是不对的。
夫至道不烦，仙方简易，今人或贵重其药，艰难其事，皆非也。
In fact, the highest Taoism is not trivial, and the magic formula of immortals is the simplest. It is wrong to think that the medicine used in alchemy is very precious today, or how difficult it is to refine alchemy.