法華義疏 10.224

10.224

作此問者不讀《法華．壽量品》。〈壽量品〉云「如來如實知見，三界無有生滅，乃至非實非虛」，故知三界即是法身，亦令眾生作如此悟也。

One who asks this has not read the Lifespan Chapter of the Lotus Sūtra. The Lifespan Chapter says: "The Tathāgata truly sees and knows that within the three realms there is no arising or cessation... down to neither real nor unreal"; therefore one knows that the three realms are themselves the dharmakāya, and it also causes sentient beings to attain such an awakening.