《资治通鉴·唐纪·唐纪八》
譬如一座山，取其一土一石则不能称为山，但是如果去掉土石，山又何在！
譬诸山，取其一土一石而谓之山则不可，然土石皆去，山于何在哉！
For example, a mountain, if you take one piece of soil and stone, it cannot be called a mountain, but if you remove the soil and stone, where is the mountain!