弘明集 6.49

6.49

周之問曰。論云。時殊故不同其風。是佛教之異於道也。世異故不一其義。是道言之乖於佛也。道佛兩殊則鳧則乙。

Zhou's inquiry: The treatise says, 'Because the times differed, their styles were not the same,' which means Buddhist teachings differ from the Dao. 'Because eras differed, their meanings were not unified,' which means the words of the Dao run contrary to the Buddha. When the Dao and the Buddha are both different, then one is a duck and the other is a swallow.