It is said in the śāstra that ṣaṭ-karma-nipuṇo vipro mantra-tantra-viśāradaḥ. The brāhmaṇa, he knows the brahminical business, sat-karma, means paṭhana pāṭhana yajana yājana dāna pratigraha. A brāhmaṇa must be very learned scholar, pathana, and he shall make others also good scholar. The brāhmaṇa is the teacher. That is brāhmaṇa's business. Paṭhana pāṭhana yajana yājana. He must be a good worshiper of the Supreme Lord, and he must teach others how to become brāhmaṇa, how to worship. Yajana yājana. And dāna pratigraha. Brāhmaṇa, Vaiṣṇava Still the world is going on. At least in India the brāhmaṇa Vaiṣṇavas, they are given charities without any hesitation. Because that mentality is still existing in India, so somebody is taking advantage of it. Unnecessarily they are changing dress and begging and making money. No. So dāna pratigraha. Therefore a brāhmaṇa, as soon as there is excess money, he would immediately spend it for Kṛṣṇa. Dāna pratigraha. He will charity. He'll make charity. He'll distribute prasādam. He'll not keep money for future. No. Dāna pratigraha. So even one is perfect brāhmaṇa like that, yajana yājana paṭhana pāṭhana dāna pratigraha, and mantra-tantra-viśāradaḥ... So if he is actually learned scholar, he must be very expert in quoting, chanting the Vedic mantra, Vedic hymns. That is the sign that he has read something. He has studied Vedas. So mantra-tantra-viśāradaḥ. So avaiṣṇavo gurur na sa syāt. One disqualification: if he is not a Vaiṣṇava, then he cannot become guru. Forgive him, immediately. Ṣaḍ vaiṣṇavaḥ śva-paco guruḥ. Śvapaca means dog-eaters. If one is coming from the family of dog-eaters In India the dog-eaters are considered the lowest of the society, caṇḍāla. But if he is a Vaiṣṇava, then he can become guru. It doesn't matter. Śrī Caitanya Mahāprabhu also supports this.
yei bhaje sei baḍa, abhakta-hīna, chāra
- kṛṣṇa-bhajane nāhi jati-kulādi-vicāra
- (CC Antya 4.67)
This is Caitanya Mahāprabhu said to begin.
So here are the examples in the śāstras, that Bharata Mahārāja, elected or selected, nominated by the Supreme Personality of Godhead, Ṛṣabhadeva... And He retired, avadhūta-veṣa. Avadhūta-veṣa means He is no more within the social community. Just like the word nirgranthā... Kurvanty ahaitukīṁ bhaktim ittham-bhūta-guṇo hariḥ. Śrī Caitanya Mahāprabhu has explained this word nirgranthā. Nirgranthā means one who has no granthi, no tight knot with this material world. And the another meaning, one who has no connection with granthā, nirgranthā. So there are two classes of men. One is foolish rascal, no education. He is called also nirgranthā, and another person who has no connection with this material world, he is also nirgranthā. So here the sign of Ṛṣabhadeva, He became just like a madman, a deaf and dumb, a rascal, a fool, a ghost. But He is not madman. He is the Supreme Personality of Godhead. That is... Apparently it may look like that, but He is Supreme Personality of Godhead. He has no connection, either you call Him deaf and dumb, fool, rascal, whatever you call. You can call. Tṛṇād api sunīcena. He has no connection with this body. This is avadhūta-veṣa. When one, no more he has got any connection with this material body, he is avadhūta-veṣa.