維摩經玄疏 6.80

6.80

第六、約觀心者，若小乘行人持戒、坐禪，發背捨、勝處、一切法門，若不得無常、無我、寂滅之印，入此觀中，皆成邪倒，不能悟理成無漏也；大乘觀法，亦復如是，若不得法性實相印者，多成魔業，墮於二邊，豈得入不二法門、住不思議解脫也！

Sixth, regarding contemplation of the mind: if Hīnayāna practitioners observing the precepts and practicing dhyāna give rise to the liberations, the bases of mastery, and all the dharma-doors, but do not obtain the seal of impermanence, non-self, and quiescence, entering into this contemplation will completely result in perverse inversions, and they will be unable to awaken to the principle and achieve the outflow-free; the Mahāyāna methods of contemplation are also like this: if one does not obtain the seal of the true mark of dharma-nature, one will mostly accomplish Māra's deeds and fall into the two extremes; how could one enter the non-dual dharma-door and abide in inconceivable liberation!