mantrās tu kṛṣṇa-devasya sākṣād bhagavato hareḥ
mantrās tu kṛṣṇa-devasya sākṣād bhagavato hareḥ |
sarvāvatāra-bījasya sarvato vīryavattamāḥ ||
tatrāpi bhagavattāṁ svāṁ tanvato gopa-līlayā |
tasya śreṣṭhatamā mantrās teṣv apy aṣṭādaśākṣaraḥ ||
(Hari-bhakti-vilāsa: 1.155, 159)
“Mantras of Kṛṣṇadeva, that is, Bhagavān Hari himself, he who is the source of all avatāras, however, are the most potent of all. … Therein, furthermore, the mantras related to him spreading his own Bhagavattā [i.e., nature of Bhagavān] by means of [his] līlā as a cowherd are the best of all, and even among those, the eighteen-syllable [mantra, i.e., the Gopāla-mantra, is the very best of all].”