法華論疏 3.145

3.145

In explaining the second, the statement that Prabhūtaratna Tathāgata entered nirvāṇa introduces the section heading of the equality of the worldly and nirvāṇa. "The worldly and nirvāṇa, one and the other, are equal and without distinction" means that Prabhūtaratna Tathāgata is constantly in the worlds of the ten directions, yet is said to have entered nirvāṇa; therefore, we know that the worldly and nirvāṇa are equal.