摩訶止觀 9.70

9.70

若人發大不淨，入背捨亦大，初禪攝。若內無骨人，外觀八色及依正兩報，緣境大故，名第二大背捨，二禪攝。若以大不淨入淨背捨亦大，乃至滅背捨亦如是。若論大勝處者，更熟背捨，令於緣轉變自在。《大論》明鈍人修八背捨竟，方修勝處、一切處；中根修三背捨竟，於四禪中修勝處等；上根祇修初背捨即修一切法也。今處中說。

If a person activates great impurity, their entry into liberation is also great, subsumed under the first dhyāna. If internally there is no skeleton and externally one contemplates the eight colors along with both environmental and primary recompense, because the objective realm is vast, it is called the second great liberation, subsumed under the second dhyāna. If by means of great impurity one enters the pure liberation, it is also great, up to and including the liberation of cessation. As for the great bases of mastery, they further ripen the liberations, bringing about mastery over the transformation of objects. The *Mahāprajñāpāramitopadeśa* explains that dull persons, having completed the eight liberations, only then cultivate the bases of mastery and the totalities (kṛtsnāyatana); those of medium faculties, having completed the three liberations, cultivate the bases of mastery and so on in the fourth dhyāna; those of sharp faculties, upon cultivating merely the first liberation, cultivate all phenomena. Here, the explanation follows the middle path.