So similarly, vaiśya. Vaiśya, they should be trained in three things, productive—kṛṣi-go-rakṣya-vāṇijyaṁ vaiśya-karma svabhāva-jam (BG 18.44)—kṛṣi, agriculture; go-rakṣya, cow protection. Go-rakṣya. That is essential, agricultural and cow protection. And vāṇijyam. Vāṇijyam means trade. If there is excess milk product, if there is excess grain product, then you can sell to others. Nowadays the trade is that you take as much milk as you can, and then kill the animal and sell the flesh to other countries. That is going on. No. Go-rakṣya. Go-rakṣya. Cow protection is very, very essential in human society because it gives the milk, the miracle food. You can prepare hundreds and thousands of preparation, all not only delicious, but brain-maintaining. You can get good brain. Therefore go-rakṣya, cow protection is especially recommended, not that animal protection. If you want to eat meat, you can eat many other animals. There are. But don't eat the cows. This is Vedic civilization. Kṛṣi-go-rakṣya-vāṇijyaṁ vaiśya-karma svabhāva-jam (BG 18.44). Paricaryātmakaṁ kāryaṁ śūdra-karma svabhāva-jam. And those who are neither brāhmaṇa... They have no brain to become brāhmaṇa or to become kṣatriya or vaiśya, they are called śūdras. And śūdra's business is to serve the other upper three classes, laborer, worker classes, and satisfied with some service.
So here it is said that tataḥ parīkṣid dvija-varya-śikṣayā: "He was educated and trained up by the best class of the brāhmaṇas," not by the śūdras. Śūdra's training, what he can become? He can become a rascal, that's all. The training was entrusted to the first-class brāhmaṇa, who is himself trained up to speak truth, satyaṁ śamo damaḥ, to remain clean, to become very simple in habit, to become master of knowledge, and practical application. Such person should be the trainer, should be the teacher. Not a third-class rascal becomes a teacher and professor. He has no idea how to speak truth. He is speaking all lies, theories, and getting Nobel Prize. Such a śūdra is honored at the present moment. You see? Who has no knowledge. So many so-called philosophers and scientists, simply speaking lies and untruth. They have no knowledge. As soon as you challenge them, they will say, "Yes, we are trying. In future we shall do it." But if you are trying, then where is your knowledge? Why you are taking the post of a teacher? You are a cheater. You have no full knowledge, and still, you are putting some theory to mislead the people.