Dīkṣā, Mantra-Types, Mantra-Doṣas, and Qualifications of Ācārya–Śiṣya
ज्ञातव्यो भ्रांत इत्येष यः स्यादष्टा दशाक्षरः । पुनर्विशतिवर्णो वा यो मंत्रः स्मरसंयुतः ॥ ३८ ॥
jñātavyo bhrāṃta ityeṣa yaḥ syādaṣṭā daśākṣaraḥ | punarviśativarṇo vā yo maṃtraḥ smarasaṃyutaḥ || 38 ||
అష్టాదశ అక్షరాల మంత్రం గానీ, లేదా ఇరవై వర్ణాల మంత్రం గానీ, స్మర (కామ) సంబంధ పదాలతో సంయుక్తమైతే—అది ‘భ్రాంత’ మంత్రం అని తెలుసుకోవాలి।
Sanatkumara (teaching Narada in the Vedanga/Mantra-śāstra context)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: bibhatsa
It warns that mantra-efficacy depends not only on form (syllable/letter count) but also on purity of intent and content; mantras tied to erotic passion (Smara) are classified as ‘bhrānta’ and are to be recognized as unsuitable for sāttvika spiritual aims.
By implying that devotion requires mental purity and God-centered remembrance; mantras mixed with passion distract the mind from steady bhakti and therefore are treated as defective for devotional practice.
A technical mantra-śāstra point: mantras are analyzed by akṣara/varṇa count and by semantic association; content linked with Smara is flagged as a defect (doṣa) affecting ritual/spiritual suitability.