Vaishnava Samhita. Chaturbhujadasa Charitam. Vol III Book VII Chp 12 Shlokas 11 - 12

संस्कारेण च मन्त्रेण संप्रदायेन जन्मना |

दृढेन भक्तियोगेन यः पूर्णः स हि भाग्यवान् ||

He alone is the really fortunate person (and a true vaishnava) who possesses unflinching devotion to Lord Hari and at the same time is respected because of his virtuous birth, knowledge of mantras, strict adherenece to rituals, and his moorings in traditional practices.