The training was entrusted to the first-class brahmana, who is himself trained up to speak truth, satya samo damah, to remain clean, to become very simple in habit, to become master of knowledge, and practically 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 sudra is honored at the present moment. You see? Who has no knowledge. So many so-called philosophers and scientist, 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.

Srila Prabhupada, Lecture, 29 Dec 1973