大乘起信論廣釋卷第三．四．五 5.79

5.79

論。當念唯心至終不為惱　釋曰。此略辨謂也。一切諸境尚唯自心。何況塵中境非心也。是故觀察唯心之理□境自哉不能嬈亂。魔境皆依動念生。故觀察唯心非彼知故。此則通明謂魔之法。別門顯者。廣如禪經及顗禪師止觀門說。而有更明別謂魔法文□鄙極。更非論意。不能繁敘。學者知之。

Treatise: "One should mindfully contemplate that it is only mind... will never cause disturbance."
Commentary: This briefly distinguishes the remedy. All objects whatsoever are still only one's own mind; how much more so could objects within sensory dust not be mind? Therefore, by observing the principle of mind-only, the [...] objects naturally cannot cause turmoil. Demonic realms all arise based on moving thoughts; therefore, by observing mind-only, it is not known by them. This generally explains the method of remedying demons. For distinguishing through distinct gates, it is explained extensively as in the meditation sūtras and Chan Master [Zhi]yi's Calming and Contemplation gates. However, there are those who further explain distinct methods of remedying demons whose texts are extremely [...] vulgar, which is not at all the treatise's intent; I cannot narrate them at length. Students should know this.