So brāhmaṇa should not charge anything, but they can take charity. So the students, they would bring charities naturally. This was brāhmaṇa's profession. They would not charge anything, but his disciples, students, would beg from door to door and bring. That is gurukula. Gurukula. Gurukula means every student should go to gurukula and learn to become very simple and obedient and self-controlled and learn how to address every woman as mother. This is guru..., from the very beginning. They would go every home. Small children or big children, they will address, "Mother, give us some alms." So every woman will give, and they would bring it to guru. And that is guru's property, not because he has begged this thing from somebody, it has become his property. No. It is guru's property. This is called brahmacārī gurukula, to gives one the training.
So when he's trained up nicely, humble, self-controlled, educated, then his second birth, second birth by Vedic knowledge. Janmanā jāyate śūdraḥ saṁskārād bhaved dvijaḥ. Saṁskāra, reformatory. He has become humble, meek, well-versed in śāstra. When these all qualifications are there, then guru says, "Now I recognize you." Upanayana. Upa means near, and nayana means bringing. So gradually the spiritual master brings him nearer. Then, when he's actually trained up, then it is called... The sacred ceremony, upanayana, means he has now come nearer to understand Vedic knowledge. Then he studies Vedas, dvija. When he is initiated, then his studying of the Vedas... Veda-paṭhād bhaved vipraḥ. So after this dvija, second birth, he studies Vedas. And when he's well versed in Vedas he is called vipra. Then, by studying Vedas, when he understands Kṛṣṇa... Vedaiś ca sarvair aham eva vedyam (BG 15.15). In the Bhagavad-gītā it is said what is Vedic study. Vedaiś ca sarvair aham eva vedyam (BG 15.15). Vedic study means to understand Kṛṣṇa. That is Vedic study. If he does not understand what is Kṛṣṇa, then he's useless.