法華義疏 5.236

5.236

「唯有一門」者，第三、序教門也。九十六種所說之教並不能出離生死，故名異門；唯依佛教方能出苦，稱「一門」也。此對外道為異，故銘佛教為一；此通喻大小乘教，總稱一佛教也。「多諸人眾」者，第四，明所化人也。三界含識品類滋繁，故云「多諸人眾」。「一百」譬天，「二百」譬人，「乃至五百」通取三途，修羅或開或合故稱「乃至」。

Regarding "it had only one gate": third, this narrates the gate of teaching. The teachings spoken by the ninety-six kinds [of non-Buddhists] are all unable to bring escape from birth and death, and are therefore called "different gates"; only by relying on the Buddha's teaching can one escape suffering, hence it is called "one gate." This is in contrast to the non-Buddhists as different, and thus the Buddha's teaching is designated as "one"; this generally parables the teachings of both the Mahāyāna and the Hīnayāna, collectively called the "one Buddhist teaching." Regarding "many people": fourth, this explains the people who are transformed. The categories of sentient beings in the three realms are luxuriantly manifold, hence it says "many people." "One hundred" parables devas, "two hundred" parables humans, "up to five hundred" broadly takes the three wretched destinies; asuras are sometimes separated and sometimes combined, hence it says "up to."