Iti śuśruma. Śuśruma means heard. The word meaning is there. "It is heard." In the Vedic disciplic succession, it is never said, "It is experienced." That is the secret of Vedic understanding. No student will . . . just like in the material world, they are engaged in research work. They are trying to find out what is the Absolute Truth or . . . even in this material world, just like people are now engaged in researching what is there in the moon planet.
So this is material policy, to try to understand things by his own experience. Pratyakṣa, direct—experimental knowledge. The Vedic understanding is different. It is śruti. Śruti means to hear from authoritative source. That is real knowledge. Just like I have given many times this example that if you want to know your father by experimental knowledge, is it possible? Not possible. Then how to know my father? By hearing from the authority, mother. That's all. Simple thing.
Similarly, things which are beyond our experimental knowledge you should not try to understand by your imperfect senses. That is not possible. If you cannot know your material father by experimental knowledge, how you can know the supreme father by experimental knowledge? The original father . . . the father of the father, father, father, you go on searching father, and the original father is Kṛṣṇa. So if you cannot understand your material father, the next generation, by experimental knowledge, how you can know God, or Kṛṣṇa, by experimental knowledge? Can you answer this, anyone?
So people are searching what is God. And searching, searching, searching, and they fail. They say: "Oh, there is no God. I am God." Finished. You see? This is not possible. Here it is said, iti śuśruma. This is Vedic knowledge. Heard, śuśruma. Wherefrom śuśruma? From the storekeeper? No. Dhīrāṇāṁ. Śuśruma . . . iti śuśruma dhīrāṇām. What is dhīrāṇām? From the sober sect. Not this fanatic sect, but the sober sect, dhīra. Dhīra means whose senses are not agitated by material influence. Or svāmī, or gosvāmī, he is called dhīra.
There are different kinds of agitations. The first agitating agent is the mind. Then the another agitating agent is this tongue. Another agitating agent is our speaking power. Vāco-vega krodha-vega. Another agitation is when we become angry. When we become angry, we forget. We do any nonsense due to the agitation of anger. When we speak in anger, we speak so many nonsense things.