viprād dviṣaḍ-guṇa-yutād aravinda-nābha-
pādāravinda-vimukhāt śva-pacaṁ variṣṭham
prāṇaṁ punāti sa kulaṁ na tu bhūri-mānaḥ
viprāt—than a brāhmaṇa; dvi-ṣaṭ-guṇa-yutāt—who is qualified with twelve brahminical qualifications; aravinda-nābha—of Lord Viṣṇu, who has a lotuslike navel; pāda-aravinda—unto the lotus feet; vimukhāt—than a person bereft of devotion; śva-pacam—a caṇḍāla, or a person accustomed to eating dogs; variṣṭham—more glorified; manye—I think; tat-arpita—dedicated unto Him; manaḥ—mind; vacana—words; īhita—activities; artha—wealth; prāṇam—life; punāti—purifies; saḥ—he; kulam—his family; na tu—but not; bhūri-mānaḥ—a brāhmaṇa proud of possessing such qualities.
" 'One may be born in a brāhmaṇa family and have all twelve brahminical qualities, but if he is not devoted to the lotus feet of Lord Kṛṣṇa, who has a navel shaped like a lotus, he is not as good as a caṇḍāla who has dedicated his mind, words, activities, wealth and life to the service of the Lord. Simply to take birth in a brāhmaṇa family or to have brahminical qualities is not sufficient. One must become a pure devotee of the Lord. If a śva-paca or caṇḍāla is a devotee, he delivers not only himself but his whole family, whereas a brāhmaṇa who is not a devotee but simply has brahminical qualifications cannot even purify himself, not to speak of his family.' "
dharmaś ca satyaṁ ca damas tapaś ca
amātsaryaṁ hrīs titikṣānasūyā
yajñaś ca dānaṁ ca dhṛtiḥ śrutaṁ ca
vratāni vai dvādaśa brāhmaṇasya
"A brāhmaṇa must be perfectly religious. He must be truthful, and he must be able to control his senses. He must execute severe austerities, and he must be detached, humble and tolerant. He must not envy anyone, and he must be expert in performing sacrifices and giving whatever he has in charity. He must be fixed in devotional service and expert in the knowledge of the Vedas. These are the twelve qualifications for a brāhmaṇa."
Bhagavad-gītā describes the brahminical qualities in this way:
śamo damas tapaḥ śaucam
kṣāntir ārjavam eva ca
jñānaṁ vijñānam āstikyaṁ
"Peacefulness, self-control, austerity, purity, tolerance, honesty, wisdom, knowledge, and religiousness-these are the qualities by which the brāhmaṇas work." (Bg. 18.42)
In the Muktāphala-ṭīkā, it is said:
śamo damas tapaḥ śaucaṁ
satyāstikye dviṣaḍ guṇāḥ
"Mental equilibrium, sense control, austerity, cleanliness, tolerance, simplicity, detachment, theoretical and practical knowledge, satisfaction, truthfulness and firm faith in the Vedas are the twelve qualities of a brāhmaṇa."
Link to this page: https://prabhupadabooks.com/cc/madhya/20/59