妙法蓮華經玄贊 4.12

4.12

然此體性合有五門：一詮旨分別，通教及理；二因果分別，通行及果；三智福分別，通福及智；四覺寂分別，通滅道諦菩提涅槃；五二利分別，通自利利他。此說一乘，故義通貫。若言佛乘，舉果攝因名；若云菩薩乘，舉因攝果稱，名便不通，義可兼有。又由行者修習二智正體、後得觀於二理生空、法空，斷於二障煩惱、所知，息於二死分段、變易，證於二果菩提、涅槃，圓得二滅無餘、無住，行於二利自利、利他，稱果滿也。所斷二障集諦所攝，所息二死苦諦所攝，所修二智所證菩提道諦所攝，所觀二理、所得二滅、所證涅槃滅諦所攝，所行二利滅道諦攝，合此滅、道名為一乘。故此本論解遮中云「無二乘者，無二乘涅槃，唯佛如來證大菩提，究竟滿足一切智慧名大涅槃，唯一佛乘故。」《涅槃經》中既以摩訶般若、法身、解脫三事圓滿名大涅槃，故此一乘二諦為體。

However, this essential nature has five gates in total: 1. the discrimination of the expressing and the expressed, extending to teaching and principle; 2. the discrimination of cause and fruition, extending to practice and fruition; 3. the discrimination of wisdom and merit, extending to merit and wisdom; 4. the discrimination of awakening and quiescence, extending to the truths of cessation and the path, bodhi and nirvāṇa; 5. the discrimination of the two benefits, extending to benefit for oneself and benefit for others. Here, the Single Vehicle is spoken of, so its meaning connects through them. If one speaks of the Buddha Vehicle, it designates the fruition to subsume the cause; if one speaks of the Bodhisattva Vehicle, it designates the cause to subsume the fruition; their designations are then not universal, but their meaning can encompass both. Furthermore, because practitioners cultivate the two wisdoms—fundamental and subsequently attained—contemplate the two principles—selflessness of persons and selflessness of dharmas—sever the two obscurations—afflictive and cognitive—quench the two deaths—mortal and inconceivable transformation—realize the two fruitions—bodhi and nirvāṇa—completely obtain the two cessations—remainderless and non-abiding—and practice the two benefits—benefit for oneself and benefit for others—this is called fruition perfection. The two obscurations to be severed are subsumed under the truth of arising; the two deaths to be quenched are subsumed under the truth of suffering; the two wisdoms to be cultivated and the bodhi to be realized are subsumed under the truth of the path; the two principles to be contemplated, the two cessations to be obtained, and the nirvāṇa to be realized are subsumed under the truth of cessation; the two benefits to be practiced are subsumed under the truths of cessation and the path. Combining these [truths of] cessation and the path is named the Single Vehicle. Therefore, this root treatise, in explaining the exclusion, says: "'There are no two vehicles' means there is no nirvāṇa of the two vehicles; only the Buddha, the Tathāgata, realizes great bodhi, ultimately fulfilling all wisdom, which is called great nirvāṇa, because there is only the one Buddha Vehicle." Since the Nirvāṇa Sūtra takes the perfection of the three matters of mahāprajñā, the dharmakāya, and liberation to be great nirvāṇa, this Single Vehicle takes the two truths as its essence.