大毘盧遮那經阿闍梨真實智品中阿闍梨住阿字觀門 1.19

1.19

As for 'wheel', in Sanskrit it is called *akṣara-cakra*. The *akṣara-cakra* means that from the single wheel of the syllable *A*, many syllables are born; hence it is called a wheel. The syllable *A* is the essential nature of awakening; just as Mahāvairocana abides in the essential nature of the bodhicitta, manifesting all kinds of universal benefits and displaying myriad transformations without limit or bound, even while displaying limitless traces in this way, he truly abides eternally immovable without arising or ceasing—just as a cart wheel, though turning without end, never shakes at its center. Because it is immovable, it can control all capacities; moving yet without movement is the meaning of the original non-arising of the syllable *A*. Since there is neither arising nor ceasing, there is neither movement nor falling back, while generating all syllables, wheel upon wheel without end; this is named the immovable wheel.