大毘盧遮那成佛經疏 2.49

2.49

第廿「云何自在心？謂思惟欲我一切如意」者，自在即外道所事天神也，彼宗計自在天能隨念造諸眾生及苦樂等事。修此法者，亦常係念願得如其本尊。若真言行人，數念如是悉地，念我隨念成就。當知是自在心，亦先習使然也。當觀諸法皆悉屬眾因緣，無有自在，是所對治。

Twentieth: regarding "What is the Īśvara mind? It means contemplating the wish that all things accord with my desire": Īśvara is the deva deity worshiped by non-Buddhists; that tradition posits that Maheśvara can create all sentient beings, suffering, pleasure, and other matters according to his thought. Those who cultivate this dharma also constantly keep their thoughts focused on wishing to become like their fundamental deity. If a mantra practitioner frequently thinks of such siddhis, thinking, "May I accomplish things in accordance with my thought," one should know that it is the Īśvara mind, which is also brought about by previous habits. Contemplating that all dharmas belong entirely to causes and conditions and possess no autonomy (īśvara) is the antidote.