Dīkṣā, Mantra-Types, Mantra-Doṣas, and Qualifications of Ācārya–Śiṣya
पञ्चषष्ट्यक्षरा मन्त्रा ज्ञेया वै शांतमानसाः । पञ्चषष्ट्यर्णमारभ्य नवनन्दाक्षरावधि ॥ ५३ ॥
pañcaṣaṣṭyakṣarā mantrā jñeyā vai śāṃtamānasāḥ | pañcaṣaṣṭyarṇamārabhya navanandākṣarāvadhi || 53 ||
அமைதியான மனத்தவர் அறிய வேண்டியது: அறுபத்தைந்து எழுத்துகளைக் கொண்ட மந்திரங்கள்—அறுபத்தைந்து எழுத்து அளவிலிருந்து தொடங்கி ‘நவ‑நந்த’ எழுத்து அளவு வரை விரியும்.
Narada
Vrata: none
Primary Rasa: shanta
Secondary Rasa: adbhuta
It emphasizes that mantra-knowledge is not merely numerical or technical; it is to be approached with a शांत-मनस् (peaceful, disciplined mind), aligning inner purity with precise mantra-structure.
By insisting on a calm, steady mind for learning mantras, it points to the bhakti principle that effective japa and worship depend on inner composure and reverence, not only external recitation.
It reflects Vedanga-oriented mantra-vidya—especially Śikṣā (phonetics) and Chandas (metrical/syllabic measures)—classifying mantras by akṣara-count (here, the 65-syllable class and onward).