Yama started the teaching by saying, i'm going to teach you vedanta. The answer to your question is vedantis. And that answer i can teach in one month in one letter, um um. He will go on to teach the same thing in simpler language, very poetic. Next mantra, he starts the teaching of self inquire, which is the heart of a dante. It collects the mind, concentrates the mind and purifies the mind. Then vedantic inquiry is powerful and effective.