大毘盧遮那經供養次第法疏 1.5

1.5

初、述大意者，夫真性至理離言絕像，應機示現無相非顯，所謂阿字等門妙明其理。今此經者，理蘊於詞、意絕文外，是故以如來加持神力，對以祕印、導以真言，所以若不從師受學禁入其門，非其人者制妄授傳，未經灌頂禁其輒聞。若得見聞頂禮者，滅除恒沙之罪；如說奉行者，德海集於其身也。

First, as for setting forth the general meaning: the ultimate principle of the true nature is free from speech and cut off from forms; yet adapting to spiritual capacities, it manifests without marks, not being unmanifest—namely, the gates such as the letter A wonderfully illuminate its principle. Now, as for this scripture, the principle is contained within the words, while its meaning transcends beyond the text. Therefore, by the Tathāgata's divine power of adhiṣṭhāna, it corresponds with secret mudrās and guides with mantras. Thus, if one does not receive instruction from a master, one is prohibited from entering its gate; to those who are not the right vessels, its reckless transmission is forbidden; and those who have not yet undergone abhiṣeka are forbidden to hear it rashly. If one is able to see, hear, and bow one's head to it, sins as numerous as the sands of the Ganges will be eradicated; if one practices it as expounded, an ocean of virtues will gather in one's person.