註華嚴法界觀門 1.187

1.187

矛，鑹也，即槍戈之類。盾，干也、排也。昔人雙賣，二事各歎其勝。歎盾云：「矛刺不入。」歎矛即云：「能穿十重之盾。」智者語云：「我買汝矛，還刺汝盾，入與不入？」即無辭矣。

A spear (mao) is a piercing weapon, belonging to the class of lances and halberds. A shield (dun) is an armor shield, a barrier. In the past, someone was selling both, praising the excellence of each of the two items. Praising the shield, he said: 'No spear can pierce it.' Praising the spear, he immediately said: 'It can pierce a ten-layered shield.' A wise person said to him: 'If I buy your spear to pierce your shield, will it pierce it or not?' He had no words in reply.