金光明經文句記 2.338

2.338

四、「其室」下，高座表四德。常我是法身，樂即解脫，淨即般若。三德互具，故一一具四不可思議，名祕密藏。是佛究竟棲依之處，故以座表。

Fourth, from "its room" down, the high throne represents the four virtues. Permanence and self are the Dharma body, bliss is liberation, and purity is prajñā. The three virtues mutually contain one another; hence each and every one possesses the four inconceivable [virtues], termed the secret storehouse. It is the place of ultimate dwelling and reliance for Buddhas; hence it is represented by the throne.