大毘盧遮那經阿闍梨真實智品中阿闍梨住阿字觀門 1.3

1.3

As for the word *ācārya*, it means one who understands the most secret of secrets, the great mind of mantra wisdom. The syllable *A* is called the seed; therefore, all are thus, and are universally received in accordance with the Dharma. If in this teaching one understands this vast wisdom and the great merit of correct awakening, one is called an *ācārya*; this is none other than a Tathāgata, and is also called a Buddha. In Sanskrit it is called *hṛd*; *hṛd* is the true mind, which is the syllable *A*.