Now, here Kṛṣṇa says that "Don't care for this body. There is soul." That is śruti. Śruti means you hear from Kṛṣṇa; then you understand. Otherwise there is no possibility to understand. The same example, as I have several times said, that who is your father? That you can under(stand) simply by hearing from your mother. That's all.
The mother says: "He is your father." What is the evidence? Hearing from the mother. That's all. Similarly anything spiritual, spiritual identity, spiritual God, spiritual kingdom, you have to learn simply by hearing from authorities. There is no other process. There is no other, second process. Simply you have to hear.
Just the same example: Who is your father, you have to simply believe your mother. Even if he . . . of course, it is not expected that she'll give a false information. Understanding the mother is nice, she'll give me. So that is the only way. You have to believe your mother, and that's all.
Similarly, if you want to understand anything spiritual, you have to take information by hearing from such authorities as Kṛṣṇa or His representative, and there is no other alternative. Other alternative, it will ever remain invisible and not understandable and so many things, negative.