妙法蓮華經玄義 4.75

4.75

非想非非想，用我三昧破者，頂天謂是涅槃果報，猶有細煩惱不自在，乃至無明不自在。修行破之，得真我、隨俗我、常樂我。例如上（云云）。

For [the sphere of] neither-conception-nor-non-conception, it is destroyed by the self samādhi: the gods at the peak of existence consider this to be the retribution of nirvāṇa, yet there are still subtle afflictions and lack of mastery, up to the lack of mastery of fundamental ignorance. Cultivating practices to destroy this, one attains the true self, the conventional self, and the permanent and blissful self. The analogy is as above, and so on.