《史记·七十列传·孟子荀卿列传》
王公大人初见他的学说，感到惊异而引起思考，受到感化想要学习，结果却不能实行。
王公大人初见其术，惧然顾化，其後不能行之。
When the prince and the great men first saw his doctrine, they were surprised and thought-provoking, and they were touched and wanted to learn it, but they could not actually do it.