首楞嚴義疏注經 10.271

10.271

不別修定次第，故云未識禪那。未學智慧方便，故云不知說法。定、慧不習而樂安禪，魔境現前，孰分邪正？當勸持呪，安其正解、防其邪慮，即不墮魔。

Because they do not specifically cultivate the stages of concentration, it says 'have not recognized dhyāna.' Because they have not learned the skillful means of wisdom, it says 'do not know how to expound the Dharma.' When concentration and wisdom are not practiced and yet one delights in resting in dhyāna, when demonic realms appear before one, who can distinguish the heretical from the correct? One should encourage them to uphold the dhāraṇī, establish their correct understanding, and prevent heretical thoughts; then they will not fall into demonic states.