《南史·列传·卷五十七》
说锋利并不是指刀，说刀也并不是指锋利，然而舍弃锋利便没有了刀，舍去刀也就没有了锋利。
利之名非刀也，刀之名非利也，然而舍利无刀，舍刀无利。
It can't be said that sharpness is not a knife, nor can it be said that a knife is not sharpness. However, when sharpness is gone, the knife is gone; and when the knife is gone, sharpness is gone.