तदेव चक्रं सुदर्शनं महाचक्रं तस्य मध्ये नाभ्यां तारकं भवति यदक्षरं नारसिंहमेकाक्षरं तद्भवति षट्सु पत्रेषु षडक्षरं सुदर्शनं भवत्यष्टसु पत्रेष्वष्टाक्षरं नारा-यणं भवति द्वादशसु पत्रेषु द्वादशाक्षरं वासुदेवं भवति षोडशसु पत्रेषु मातृ- काद्याः सबिन्दुकाः षोडश कला भवन्ति द्वात्रिंशत्सु पत्रेषु द्वात्रिंशदक्षरं मन्त्रराजं नारसिंहमानुष्टुभं भवति तद्वा एतत्सु- दर्शनं महाचक्रं सार्वकामिकं मोक्षद्वारमृ- ङ्मयं यजुर्मयं साममयं ब्रह्ममयममृतमयं भवति तस्य पुरस्ताद्वसव आसते रुद्रा दक्षिणत आदित्याः पश्चाद्विश्वे देवा उत्त- रतो ब्रह्मविष्णुमहेश्वरा नाभ्यां सूर्याच- न्द्रमसौ पार्श्वयोस्तदेतदृचाभ्युक्तम्- ऋ- चो अक्षरे परमे व्योमन्यस्मिन्देवा अधि विश्वे निषेदुः ।यस्तं न वेद किमृचा क- रिष्यति य इत्तद्विदुस्त इमे समासते इति ।तदेतन्महाचक्रं बालो वा युवा वा वेद स महान्भवति स गुरुर्भवति स सर्वेषां मन्त्राणामुपदेष्टा भवत्यनुष्टुभा
In plain words
This is the Sudarśana wheel laid bare, layer by layer. At its very center sits a single syllable -- the tāraka, the one that carries a person across, and it is Narasiṃha's own syllable. Move outward one ring and you find the six-syllable Sudarśana mantra; one ring further, the eight-syllable Nārāyaṇa; then twelve syllables for Vāsudeva; then sixteen, the whole alphabet wrapped around its dot; and finally, on the outermost thirty-two petals, the king of all mantras -- Narasiṃha himself, set in the Anuṣṭubh meter. And this wheel is not just diagram: it is made of the three Vedas, made of brahman, made of immortality itself. Around it the gods take their places like compass points -- the Vasus and Rudras in front, the Ādityas to the south, the All-gods to the west, Brahmā, Viṣṇu and Śiva to the north, and the sun and moon flanking the hub itself on either side. And a verse from the Veda is quoted to seal the point: on that one imperishable syllable, in the highest heaven, every god has already taken a seat. Someone who does not know that syllable -- what good will reciting verses do him? But whoever does know it sits there too, right where the gods are sitting. Whoever learns this Great Wheel, the text says -- child or grown, it doesn't matter -- becomes great, becomes a teacher, becomes the one who can instruct others in every mantra there is.
Close to the Sanskrit
That very wheel is the Sudarśana Great Wheel. In its middle, at the hub, is the tāraka -- the syllable that is Narasiṃha, the single syllable, is what it is. On the six petals, the six-syllabled Sudarśana occurs; on the eight petals, the eight-syllabled Nārāyaṇa occurs; on the twelve petals, the twelve-syllabled Vāsudeva occurs; on the sixteen petals, the sixteen parts -- the alphabet-letters beginning with the bindu -- occur; on the thirty-two petals, the thirty-two-syllabled king of mantras, the Narasiṃha [mantra], in the Anuṣṭubh meter, occurs. That indeed is this Sudarśana Great Wheel -- universally-desired, the door to liberation, made of the Ṛgveda, made of the Yajurveda, made of the Sāmaveda, made of brahman, made of immortality. In front of it sit the Vasus, and the Rudras; to the south, the Ādityas; to the west, the All-gods; to the north, Brahmā, Viṣṇu and Maheśvara; at the hub, the sun and moon, flanking it on its two sides. Regarding this, this has been declared by a verse: 'On the imperishable syllable, in the highest heaven, in which all the gods have taken their seat -- whoever does not know that, what will he do with a verse? Those who indeed know it, they sit here, established.' Whoever, whether a child or a young man, knows this Great Wheel, he becomes great, he becomes a teacher, he becomes the instructor of all mantras, through the Anuṣṭubh...