《陈书·列传·卷二十》
成仙的要术他还未从师学习，炼丹灶内的配方那诀窍我却知道。正恐怕南阳菊水到头来不延长寿命，束海变桑田的事无从看到。
岂银台之要，彼未从师，金灶之方，吾知其决，政恐南阳菊水，竟不延龄，东海桑田，无由可望。
The magical art of cultivation has not been learnt from a teacher but I know the formula and tricks of the alchemy furnace. I am afraid that the Nanyang Chrysanthemum will not prolong one’s life and the happening of the Sea of Shu turning into mulberry field cannot be seen.