中觀論疏 2.22

2.22

一者八不明十二因緣不生不滅。《大涅槃經》亦云「十二因緣具足十不，具五性義。以十二因緣不生不滅能生觀智，故即境界佛性。能發無生滅觀，即是觀智佛性。觀智明了，謂菩提果性。斷常諸邊畢竟寂滅，即大涅槃果果佛性。然十二因緣未曾境智，亦非因非果，即中道正性。」此五性非是五體，即一十二因緣不生不滅具足五種。故知八不具五性也。

First, the eight negations clarify that the twelve links of dependent origination are neither arising nor ceasing. The Mahāparinirvāṇa-sūtra also says: 'The twelve links of dependent origination are fully endowed with the ten negations and endowed with the meanings of the five natures. Because the twelve links of dependent origination are neither arising nor ceasing and can give rise to contemplative wisdom, they are the Buddha-nature as the objective realm. Being able to produce the contemplation of non-arising and non-ceasing is the Buddha-nature as contemplative wisdom. When contemplative wisdom is fully clarified, it is called the Buddha-nature as the fruit of bodhi. The ultimate tranquility of all extremes such as annihilation and permanence is the Buddha-nature as the fruit-of-the-fruit of Great Nirvāṇa. However, the twelve links of dependent origination have never been either object or wisdom, nor cause nor fruit; this is the Buddha-nature as the middle way.' These five natures are not five separate entities; rather, the single, unarising and unceasing twelve links of dependent origination are fully endowed with all five kinds. Thus we know that the eight negations are endowed with the five natures.