法華義疏 10.220

10.220

若作二見即不得益。今既悟佛壽無始無終不生不滅、絕四句超百非，即了己身亦爾，此即悟眾生、佛不二，是故得益。

If one adopts dualistic views, then one does not attain benefits. Now, having awakened to the Buddha's lifespan as having no beginning and no end, being unarisen and unceasing, severing the four propositions and transcending the hundred negations, one immediately understands that one's own body is also like this; this is precisely awakening to the non-duality of sentient beings and the Buddha, and therefore one attains benefits.