大毘盧遮那成佛經疏 14.54

14.54

時金剛手，毘盧遮那如來身語意地昇法界平等觀者，猶此菩薩能知如來身口意密，故名祕密主也。如來意密之法，唯佛與佛乃能究了。如意者，當知是身口亦如是。今此菩薩亦能知之，當知是位同大覺，為欲度眾生故，示為菩薩而相起發也。此中身密者即是諸印，如四重大漫荼羅一一本尊各有密印。若觀此身印，即知此尊所表祕密之德，隨類上中下差別有無量種也。語密者即是諸尊所有真言，聞此真言即知此尊內證之德也。意密者即是本尊瑜伽之觀，亦隨四重方位各各不同，與此相應即入如來意祕密之藏也。此中身語意密，上從佛菩薩位，及二乘、諸天八部無量差別。廣而論之，乃至十世界塵數各各不同；略而言之，如此經中所表之位，謂皆表如來身口意祕密之德。若能如實了知，即同於祕密主也。今祕密主菩薩住於法界平等觀，為念未來眾生，普令一切裂大疑網，故即於佛前而說大真言王。如文可知也。真言曰：

Regarding "Then Vajrapāṇi, on the level of the body, speech, and mind of Vairocana Tathāgata, arose to the contemplation of the equality of the dharmadhātu": because this bodhisattva is able to know the mysteries of the Tathāgata's body, speech, and mind, he is called the Lord of Mysteries. The teachings of the Tathāgata's mind mystery can only be thoroughly realized between Buddha and Buddha. As it is with the mind, so one should know it is with body and speech as well. Now this bodhisattva is also able to know them; one should know that his stage is equal to the Great Awakened One, but in order to deliver sentient beings, he manifests as a bodhisattva to inspire and prompt [the teaching]. Here, the body mystery refers to the various mudrās: just as in the fourfold great maṇḍala, each deity has their own secret mudrā. If one observes this bodily mudrā, one immediately knows the secret virtues represented by this deity, with immeasurable kinds according to the differences of superior, middling, and inferior categories. The speech mystery refers to the mantras belonging to the deities; upon hearing this mantra, one immediately knows the inwardly realized virtues of this deity. The mind mystery refers to the yoga visualization of the deity, which also differs according to the directions of the fourfold tiers; when in correspondence with this, one enters the treasury of the Tathāgata's mind mystery. In this, the mysteries of body, speech, and mind span from the stages of buddhas and bodhisattvas down to the two vehicles, devas, and the eight classes, with immeasurable distinctions. Discussed extensively, they differ as numerous as the dust motes of ten worlds; discussed concisely, as the stages represented in this sūtra, they all represent the virtues of the Tathāgata's secret body, speech, and mind. If one can know them as they truly are, one is equal to the Lord of Mysteries. Now, Bodhisattva Lord of Mysteries abides in the contemplation of the equality of the dharmadhātu, and mindful of future sentient beings, wishing to cause everyone to tear apart the great net of doubt, he spoke the King of Great Mantras before the Buddha. As the text states, it may be understood. The mantra says: