摩訶止觀 8.160

8.160

夫發心真正、慧解分明，善識諸相一一無謬，不為諸障所惑，打心入理，更增其明。行有餘力，分別業門；雖通達自在，兼以化他。若分別業相不能縷碎，但總知是障，無所取著，直打心觀理，業不能礙。若本無解心，又發意邪僻，見此相已而生愛著，魔得其便入示吉凶，更相因倚，貿易財食，死墮鬼道；此非鬼禪更謂誰耶？若自正正他，須得其意。親自行證，又師氏口決，方可彰言。莫輒媒衒，妄作寒熱，禍則大矣！深囑！深囑！後生慎之！

Now, when the arousal of the mind is correct and genuine and prajñā-understanding is distinct and clear, one skillfully recognizes all marks one by one without error, is not confused by the various hindrances, penetrates the mind directly into reality, and increases in brightness all the more. If, having practiced, one has strength to spare, one distinguishes the gateways of karma; although one is unobstructed and sovereign [therein], this is additionally to transform others. If, in distinguishing the marks of karma, one cannot dissect them finely, yet generally knows them to be hindrances and clings to nothing, but directly strikes into the mind to contemplate reality, then karma cannot obstruct. If originally one lacks an understanding mind and furthermore arouses depraved intentions, and upon seeing these marks generates craving and attachment, māras will find an opening, enter, and display signs of fortune and misfortune; mutually relying on one another, they trade for wealth and food, and upon dying fall into the realm of hungry ghosts—if this is not ghost-dhyāna, what else can it be called? If one wishes to rectify oneself and rectify others, one must grasp its essential meaning. Only when one has personally practiced and verified it, and received oral instructions from a master, may one speak of it publicly. Do not casually peddle it, falsely manufacturing cold and heat—the disaster would be great indeed! I give this deep injunction! I give this deep injunction! May later generations be cautious!