Brāhmaṇa is always satisfied
Teaching is the business of the brāhmaṇa. No salary. Formerly, all the brāhmaṇas, they used to have that… It is called ṭola, catuṣpāṭhī. Catuṣpāṭhī [A school where up to the four Vedas are taught]. Brāhmaṇa, he’ll sit down anywhere and invite that “If you like, you can come and take some teachings from me.”
Brahmānanda: Caitanya Mahāprabhu did that.
Prabhupāda: Yes. So still in villages you’ll find the brāhmaṇa is sitting somewhere, and the small children are coming, and they’re bringing some presentation. Somebody’s bringing rice, somebody… And brāhmaṇa was satisfied, satisfied: “Whatever Kṛṣṇa sends, that’s all right.” This is brahminical qualification. He doesn’t want more. There was a brāhmaṇa teacher in Krishnanagara. So the zamindar of Kṛṣṇa…, Rāja-kṛṣṇa-candra, he went that “Brāhmaṇa, what can I help you?” “No, I don’t want your help.” “No, you are… Your house is not very good, and your…” “No, I am quite satisfied.” “How you are pulling on?” “No, I have got my student. They bring some rice. And here is a tamarind tree. My wife collects some leaves, boils it, and that becomes nice soup. And these boys bring some rice. I am quite satisfied.”
[break] “…as your production is there, give me twenty-five percent. I’ll give you protection.” That is kṣatriya business. Brāhmaṇa’s business: teaching. And vaiśya: till the field, agriculture, get your food. Now, where is dependence? Only a śūdra, he cannot take up all these things. “Give me some service, sir. Give me some service.” In the modern education, they… The more and more industries increasing, there śūdras are being trained up, technology.
Bhagavad-gītā 4.13, August 5, 1974, Vṛndāvana