金光明經文句記 6.41

6.41

Second, relying on Buddhist methods. Taking the three seasons and three months as their root, each subsuming one month, it is therefore called the three sets of three subsuming the root. Second, resolving objections: since three constitutes one count, both secular methods and Buddhist methods are discussed in terms of three. However, with secular methods, the root and the subsumed remain entirely within the three; hence it is called the three sets of three subsuming the root. As for Buddhist methods, the three sets of three serve as the subsuming root, while the three sets of one serve as the subsumed months; this may also be called the three sets of three subsuming the root.