大般涅槃經義記 7.93

7.93

「汝言因」下答第六難，先牒總非，「何以」下釋，先徵後解。解意如何？明大涅槃非五因成，從了因顯，所以是常。於中初明非五因成，先舉五因，次列後釋。下明涅槃非作因生，是了因顯，先舉二因，次列，後釋。下持涅槃對因辯之，於中先明涅槃之法非作因生，唯了因顯。次出了因，所謂三十七道品法、六波羅蜜。下復約對涅槃大小明因不同，布施、持戒乃至波若是涅槃因，不得名為大涅槃因，六波羅蜜乃得名為大涅槃因。道品亦爾，三十七品是涅槃因，無量僧祇助菩提法方得名為大涅槃因。此等差別，下文自釋。

From 'You said that because of causes' onward, it answers the sixth objection: first repeating [the objection] and rejecting it in general, then explaining from 'Why?' onward, first questioning and then explaining. What is the intended meaning of this explanation? It clarifies that great nirvāṇa is not accomplished through the five causes, but is revealed through revealing causes, and is therefore permanent. In this, it first clarifies that it is not accomplished through the five causes, first raising the five causes, then listing and subsequently explaining them. Below, it clarifies that nirvāṇa is not produced by productive causes, but is revealed by revealing causes, first raising the two causes, then listing, and subsequently explaining them. Below, it takes nirvāṇa and distinguishes it in contrast to causes; therein, it first clarifies that the dharma of nirvāṇa is not produced by productive causes, but is revealed solely by revealing causes. Next, it sets forth the revealing causes, namely the thirty-seven factors of awakening and the six pāramitās. Below, it further clarifies the differences in causes by contrasting the great and small of nirvāṇa: giving, keeping the precepts, up to prajñā are causes of nirvāṇa, but cannot be called causes of great nirvāṇa; only the six pāramitās can be called causes of great nirvāṇa. The factors of awakening are likewise: the thirty-seven factors are causes of nirvāṇa, but only the dharmas aiding awakening across immeasurable asaṃkhyeyas can be called causes of great nirvāṇa. These distinctions are explained below in the text itself.