法華論疏 2.471

2.471

問：何故明四，不多不少？又此四有何次第？答：初言開者，開十方諸佛法身。如前云「開示如來淨妙法身令生信心故」，是故第一前明其開。雖開十方諸佛法身，或謂諸佛獨有法身、二乘人所無，佛得成佛、二乘不成佛，是故明三乘人同有此法身、同皆成佛。雖明三乘同有法身，二乘人不知同一法身，故明悟有一無二。既悟有一無二則唯有進路無有退道，是故次明其人。此四無義不收，故不得多少。即是次第。

Question: Why are four explained, neither more nor less? Moreover, what sequence do these four have? Answer: First, speaking of "opening" means opening the dharmakāya of the Buddhas of the ten directions. As said before, "opening and revealing the pure and wondrous dharmakāya of the Tathāgata to cause them to give rise to faithful conviction," for this reason the first previously explained opening. Although opening the dharmakāya of the Buddhas of the ten directions, one might say that the Buddhas alone possess the dharmakāya and persons of the two vehicles lack it—that the Buddha attains Buddhahood while the two vehicles do not attain Buddhahood; for this reason it is explained that persons of the three vehicles identically possess this dharmakāya and will all identically attain Buddhahood. Although it is explained that the three vehicles identically possess the dharmakāya, persons of the two vehicles do not know the single identical dharmakāya, so it clarifies awakening to the one without a second. Having awakened to the one without a second, there is then only a forward path and no retrogressing course, and for this reason entering is explained next. These four omit no meaning, and therefore there can be neither more nor fewer. This is precisely the sequence.