法華論疏 2.538

2.538

「是故前說何等法」下，與授記，中有二：一正明六門辨與受記、第二引前五法以證六門。初章已竟，今第二引證證六門。所以引證者，凡有二義：一為釋疑故來。疑者：何以得知此正說章有六門耶？是故釋云：佛上明五法即攝六門，是故當知有六門也。二者明五法，敘佛為眾生說法。今此六門亦是為物說法，故辨六門。次引五法。就文為二：前引五法、次以五法攝六門。

From "Therefore, what was previously expounded as 'what kind of dharma'" onwards confers vyākaraṇa; within it are two parts: first, directly clarifying the six gates to distinguish the granting of vyākaraṇa; second, citing the previous five dharmas to substantiate the six gates. The first chapter is finished; now this is the second, citing proof to substantiate the six gates. As for why proof is cited, there are altogether two meanings: First, it comes to resolve doubts. The doubter asks: How do we know that this chapter on the direct expounding has six gates? Therefore it explains: Above, the Buddha clarified that the five dharmas encompass the six gates, therefore one should know that there are six gates. Second, clarifying the five dharmas recounts the Buddha expounding the Dharma for the sake of sentient beings. Now these six gates are also expounding the Dharma for beings, hence distinguishing the six gates. Next, it cites the five dharmas. In the text there are two parts: first, citing the five dharmas; next, encompassing the six gates with the five dharmas.