Mantra-Māhātmya and Sādhana of Kārtavīryārjuna
Nyāsa, Yantra, Homa, and Dīpa-Vrata
एतेषु मंत्रवर्येषु स्वानुकूलं मनुं भजेत् । एषामाद्ये विराट्छदोऽन्येषु त्रिष्टुबुदाहृतम् ॥ ४३ ॥
eteṣu maṃtravaryeṣu svānukūlaṃ manuṃ bhajet | eṣāmādye virāṭchado'nyeṣu triṣṭubudāhṛtam || 43 ||
Among these most excellent mantras, one should adopt and worship the mantra that is favorable and suited to oneself. Of them, the first is said to be in the Virāṭ metre, while the others are declared to be in the Triṣṭubh metre.
Sanatkumara (teaching Narada)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: bhakti
It teaches that mantra-practice should be aligned with the practitioner’s fitness (svānukūla), and that correct chandas (metre) is part of preserving a mantra’s intended power and meaning.
By recommending a personally suitable mantra, it supports steady, heartfelt japa and worship—key to bhakti—while insisting that devotion be grounded in proper Vedic form.
Chandas (the Vedanga of Vedic metre): it identifies Virāṭ for the first mantra and Triṣṭubh for the remaining mantras, guiding correct recitation and ritual usage.