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

輪者梵音名「阿剎囉輪」。阿剎囉輪者，謂從一阿字輪生多字，故名為輪。阿字即是菩提體性，如摩訶毘盧遮那住於菩提心體性，種種示現普門利益，種種變現無量無邊，雖如是垂跡無窮，然實常住不動亦無起滅，猶如車輪雖復運轉無窮，而中未曾動搖。由不動故能制群機，動而無動即是阿字本不生義，以無生無滅，即無動無退而生一切字，輪輪無窮，是名不動之輪。

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.