廣弘明集 2.40

2.40

At that time, Wei Wenxiu of Jingzhao lived in seclusion on the Central Peak. Shizu summoned and questioned him concerning the golden elixir of the recipe-masters. He replied: "The divine Dao is obscure and dark; its changes are hard to fathom. One may meet it in the dark, but it is difficult to anticipate beforehand. I received it from my late master in the past, but have not yet practiced it." Shizu esteemed his prominent clan and his gentleness and elegance, so he sent him with the Minister Cui Ze to Mount Wangwu. In the end, they could not compound the elixir.