《庄子·外篇·达生》
孔子转身对弟子们说： 运用心志不分散，就是高度凝聚精神，恐怕说的就是这位驼背的老人吧！ 
孔子顾谓弟子曰： 用志不分，乃凝于神。
Confucius turned to his disciples and said, "Not to lose one's mental composure is to concentrate one's spirit; I think this saying must refer to this hunchbacked old man!"