成唯識論演祕 2.707

2.707

但言無為不成六釋，無別合故。若言虛空無為等，皆成持業，並如前疏。有義：其想受滅，滅屬想受，是持業釋；想受滅無為，即依主釋；滅若無為想受之滅，即依主釋；想受滅無為，即持業釋，依又動地得無為故，不動無為亦依主釋。

Merely saying "unconditioned" does not constitute the six compound analyses (ṣaṭ-samāsa), because there is no separate combination. If one says "space-unconditioned" and so forth, they are all appositional compounds (karmadhāraya), all as in the previous commentary. There is an opinion: in "cessation of conception and sensation," cessation belongs to conception and sensation, which is an appositional compound; "unconditioned of the cessation of conception and sensation" is then a determinative compound (tatpuruṣa). If cessation is unconditioned, "cessation of conception and sensation" is a determinative compound; "unconditioned of the cessation of conception and sensation" is then an appositional compound. Furthermore, because the unconditioned is attained depending on the ground of agitation, "unshakeable unconditioned" is also a determinative compound.