Prabhupada, Honolulu, May 21, 1976: [...] A sudra, actually those who are by qualification sudra… Sudra means lamentation, simply changing. They accept something, and then they find it useless, and they lament.
The so-called scientists, philosophers, they’re all sudras because they say, “We have discovered something,” and after few years, “Oh, it is now useless.” Another theory. Sudra. So sudra cannot give you any education. That is not possible. Education has to be taken from brahmana.
That is the Vedic system. Brahmana is the teacher because they are trained up—satya sama damo titiksa arjavam, jnanam vijnanam astikyam brahma-karma-svabhava-jam. Therefore in India still, not in the city but in the village, the brahmana is accepted as teacher, natural teacher.
And there was…brahmana, they are teachers, natural teachers, and there is no fees. No fees. Just like we started this Krishna consciousness movement, teaching, but there was no fees. This is the teaching, real teaching. So brahmana should not charge anything, but they can take charity. Full Lecture