妙法蓮華經玄義 7.194

7.194

又流通利益者，前流通迹門，是諸發誓菩薩及諸羅漢得授記者，此土、他土弘經，論其功德。觀文，但明冥利，不說顯益。今說本門，付囑一切諸佛所有之法，兼得迹門法也。秘奧之藏，即是本迹中實相也。一切甚深之事，即是本迹中因果也。如此等法，付囑千世界微塵菩薩，法身地弘經，何但如生身，此土、他土弘經耶？十法界身遊諸國土，則有冥、顯兩益也。疑者云：法身常有佛，何須菩薩弘？但弘之在人，待時待伴，如佛雖在世，而文殊入龍宮，法身處雖有佛，復須外緣。故佛付囑，吐舌摩頂，種種相貌，殷勤付囑，令弘此法得無量微妙功德。其有聞者，妙益不可稱數。故文云：若有聞佛說壽量，一切皆歡喜，得無量無漏功德之果報。即此意也。

Furthermore, as for the benefit of dissemination: previously, in disseminating the trace gate, it was those bodhisattvas who made vows and the arhats who received predictions, propagating the sūtra in this land and other lands, whose merits were discussed. Examining the text, it only clarifies hidden benefit, not mentioning manifest benefit. Now expounding the original source gate, it entrusts the dharmas possessed by all buddhas, which also encompasses the dharmas of the trace gate. The treasury of secret mysteries is none other than the true mark within the original source and the traces. All the extremely profound matters are none other than cause and effect within the original source and the traces. Such dharmas as these are entrusted to bodhisattvas [as numerous as] the dust motes of a thousand worlds, propagating the sūtra on the stage of the dharma-kāya; how could it merely be like the physical body propagating the sūtra in this land and other lands? With bodies of the ten dharma realms traveling across lands, there are both hidden and manifest benefits. A doubter says: 'Where there is a dharma-kāya, there is always a buddha; why is there need for bodhisattvas to propagate it?' But propagation rests with people, waiting for the time and waiting for companions; just as although the Buddha was in the world, Mañjuśrī entered the dragon palace; although there is a buddha at the place of the dharma-kāya, external conditions are again required. Therefore the Buddha made the entrustment, extending his tongue, patting their heads, in various manners diligently entrusting it, causing the propagation of this Dharma to obtain immeasurable, subtle, and wonderful merits. For those who hear it, the subtle benefits cannot be counted. Therefore the text states: 'If there are any who hear the Buddha expound the lifespan, all are joyful and obtain the fruit of immeasurable undefiled merit.' This is precisely this meaning.