金光明經玄義 1.14

1.14

云何三？云何身？法、報、應是為三。三種法聚故名身。所謂理法聚名法身，智法聚名報身，功德法聚名應身。然理無聚散，義言聚散。始從初心顯出正理，乃至究竟理聚方圓。始從初心、終至究竟，顯理之智智聚方圓。始從初心、終至究竟，功德之聚方圓。故以三法聚為三身。當知三身皆常樂我淨，即是三德，可尊可重即是三寶，不生不滅即是涅槃無二無別。既以金光明譬三德等，還以金光明譬三身也。

What is meant by "three"? What is meant by "kāya" (body)? Dharmakāya, saṃbhogakāya, and nirmāṇakāya are the three. An aggregation of three kinds of dharmas is called a kāya. What is called the aggregation of principle-dharmas is named the dharmakāya; the aggregation of wisdom-dharmas is named the saṃbhogakāya; the aggregation of merit-dharmas is named the nirmāṇakāya. However, the principle has neither aggregation nor dispersal; it is by way of meaning that we speak of aggregation and dispersal. Beginning from the initial mind, the correct principle is revealed, up to ultimate realization, where the aggregation of principle is fully complete. Beginning from the initial mind to the ultimate realization, the wisdom that reveals the principle is fully complete as an aggregation of wisdom. Beginning from the initial mind to the ultimate realization, the aggregation of merit is fully complete. Therefore, taking the three aggregations of dharmas constitutes the trikāya. One should know that the trikāya are each permanence, bliss, self, and purity, which are the three virtues; being honourable and reverend, they are the three jewels; being non-arising and non-ceasing, they are nirvāṇa, neither dual nor distinct. Since the Suvarṇaprabhāsa serves as a metaphor for the three virtues and so forth, the Suvarṇaprabhāsa also serves as a metaphor for the trikāya.