淨名經集解關中疏 1.517

1.517

佛為世尊。過於三界　二明三界受生苦也。悟界如幻不受生故樂也。生曰。既以思欲為原。便不出三界。三界是病之境也。佛為悟理之體超越其域。應有何病也。

"The Buddha is the World-Honoured One, who transcends the three realms." Second, explaining that taking birth in the three realms is suffering. Because he has awakened to the realms as illusory and does not take birth, it is bliss. Daosheng says: "Once thought and desire are the source, one does not transcend the three realms. The three realms are the domain of illness. The Buddha is the embodiment of the awakened principle and has surpassed their bounds; how could he have any illness?"