坐禪三昧經 2.90

2.90

問曰：「如《摩訶衍般若波羅蜜》中言：『諸法不生不滅，空無所有，一相無相，是名正見。』云何言無常等觀名為正見？」

Question: "As stated in the Mahāyāna Prajñāpāramitā: 'All dharmas are unborn and unceasing, empty, without anything existing, of a single mark which is markless—this is called right view.' Why then do you say that contemplating impermanence and so forth is called right view?"