大般涅槃經義記 7.380

7.380

上來第一通就諸法以彰七別，自下第二就佛論七明七無別。於中就佛但明五義，法、僧二門略而不辯。「佛不起惱名涅槃」者，就佛以明涅槃之義。「智慧無礙名如來」者，就佛辯釋如來之義。「非凡夫等名佛性」者，就佛解釋佛性之義。「身心智慧滿無量土名虛空」者，就佛解釋虛空之義。「常住不變名實相」者，就佛解釋實相之義。「以是如來不涅槃」者，以佛常住不變易故，實不畢竟永入涅槃，「是名第七」總以結之。

The above is the first part, which generally clarifies the seven distinctions in terms of all dharmas; from here down is the second part, which treats the seven in terms of the Buddha to clarify that the seven are without distinction. Therein, in terms of the Buddha he clarifies only five meanings, the two gates of Dharma and Saṅgha being omitted and not discussed. 'The Buddha not giving rise to afflictions is named nirvāṇa' clarifies the meaning of nirvāṇa in terms of the Buddha. 'Unobstructed wisdom is named the Tathāgata' explains the meaning of the Tathāgata in terms of the Buddha. 'Being unlike ordinary beings and the like is named buddha-nature' explains the meaning of buddha-nature in terms of the Buddha. 'Body, mind, and wisdom filling immeasurable lands is named space' explains the meaning of space in terms of the Buddha. 'Permanently abiding and unchanging is named the true mark' explains the meaning of the true mark in terms of the Buddha. 'Because of this, the Tathāgata does not enter nirvāṇa' means that because the Buddha is permanently abiding and unchanging, he truly never enters nirvāṇa ultimately and eternally; 'this is called the seventh' concludes it overall.