大般涅槃經義記 5.317

5.317

自下第三約就大小辯定優劣，如來先辯，第二領解。如來辯中，先舉四數，「夫無量者則有四種」，次列四名，次辯其相。解初門中，先問後辯。「緣多眾生」故名為緣。「而不能得自在三昧」，與樂艱難，故非自在。

From here below, the third [section] distinguishes and determines superiority and inferiority with reference to the Mahāyāna and Hīnayāna. The Tathāgata first distinguishes it, and secondly [the listener] accepts and understands. In the Tathāgata's distinction, he first raises the number four: "Now, as for the immeasurables, there are four kinds"; next he lists the four names; and next he distinguishes their marks. In explaining the first category, he first asks and then distinguishes: because it "takes many sentient beings as its object," it is called "having an object"; "yet is unable to attain sovereign samādhi" because bestowing happiness is difficult, and therefore it is not sovereign.