1424
Śrīmad-Bhāgavatam
[Canto 3, Ch. 33]
It is sometimes remarked that by the chanting process one begins to purify himself and can take birth in his next life in a  brāhmaṇa  family and then be reformed. But at this present moment, even those who are born in the best  brāhmaṇa  families are not reformed, nor is there any certainty that they are actually born of  brāhmaṇa  fathers. Formerly the  garbhādhāna  reformatory system was prevalent, but at the present moment there is no such  garbhādhāna , or seed-giving ceremony. Under these circumstances no one knows if a man is factually born of a  brāhmaṇa  father. Whether one has acquired the qualification of a  brāhmaṇa  depends on the judgement of the bona fide spiritual master. He bestows upon the disciple the position of a  brāhmaṇa  by his own judgement. When one is accepted as a  brāhmaṇa  in the sacred thread ceremony, under the pāñcarātric system, then he is  dvija , twice-born. That is confirmed by Sanātana Gosvāmī:  dvijatvam jāyate . By the process of initiation by the spiritual master, a person is accepted as a  brāhmaṇa  in his purified state of chanting the holy name of the Lord. He then makes further progress to become a qualified Vaiṣṇava, which means that the brahminical qualification is already acquired.
TEXT 7
अहो बत श्वपचोऽतो गरीयान् 
  यजिह्वाग्रे वर्तते नाम तुभ्यम् । 
  तेषुस्तपस्ते जुहुवुः सस्नुरार्या 
  ब्रह्मानूचुर्नाम गृणन्ति ये ते ॥ ७ ॥
aho bata śva-paco 'to garīyān 
  yaj-jihvāgre vartate nāma tubhyam 
  tepus tapas te juhuvuḥ sasnur āryā 
  brahmānūcur nāma grṇanti ye te
aho bata—oh how glorious; śva-pacaḥ—a dog-eater; ataḥ—hence; garīyān—worshipable; yat—of whom; jihvā-agre—on the tip of the tongue; vartate—is; nāma—the holy name; tubhyam—unto You; tepuḥ tapaḥ—practiced austerities; te—they; juhuvuḥ—executed fire sacrifices; sasnuḥ—took bath in the sacred rivers; āryāḥ—Āryans; brahma anūcuḥ—studied the Vedas; nāma—the holy name; grṇanti—accept; ye—they who; te—Your.