首楞嚴義疏注經 9.304

9.304

受陰交互者，不能定慧均平，善巧安忍。既失方便，異念即生，由此故有十種境界，皆是內心交互，外引諸魔。苟能識之，不落邪見。

'Mutual interaction within the aggregate of feeling' means being unable to balance concentration and wisdom equally and to abide patiently with skillfulness. Having lost the expedient means, aberrant thoughts immediately arise. Because of this, there are ten kinds of states, all of which are internal mental interactions that externally attract demons. If one can recognize them, one will not fall into wrong views.