《庄子·外篇·达生》
即使如此，有一点可以讲一讲。臣将要作鐻时，不敢有一点分散精神，一定要斋戒使心志安静专一。
虽然，有一焉：臣将为鐻，未尝敢以耗气也，必齐以静心。
"Even so, there must be something you can say about it. When I about to make the cup, I would not let my mind wander and I would fast so that my mind would be quiet and focused.