Professor (Hṛdayānanda): He's saying that for example he could listen to everything that you were saying, and then he could repeat it, and someone might say to him that "Oh, you are an expert. You are a master," but actually he's not. He's simply repeating.
Prabhupāda: No, this is example. By receiving a knowledge, you must corroborate by your knowledge or by your experience, by the method. Just like in the Bhagavad-gītā, it is said that Arjuna was declining to fight in the war. So Kṛṣṇa said that "You are simply lamenting on this body, but you do not know what is the active principle of the body." So this you can understand very nicely, that everyone is working for this body, but nobody knows what the active principle of the body. Without the active principle of the body, this body, alive or dead, is the same thing, lump of matter. So Arjuna accepted Kṛṣṇa as teacher; therefore He is chastising him that "You are talking like a learned man, but you are lamenting on this body, but no learned man laments on this body, either dead or alive." Because without the knowledge of the active principle which is moving the body, what is the use of simply understanding the bodily construction? The medical science knows the construction of the body, anatomy, physiology, the bone, this muscle, the blood and everything, but he does not know what is the active principle. When the active principle gone, they cannot repair it. So there may be vast advancement of medical science, but if the medical science cannot check birth, death, old age and disease, then what is the use of it? It may have some temporary use, but actually it is not science. Nobody wants to die. Is there medical science which can stop death? So that knowledge may be temporary, beneficial, but ultimately, it is not the knowledge. I am anxious for not dying. Nobody wants to die. This is my anxiety. And where is that science, medical science? So we are satisfied with some temporary knowledge. We have no ultimate knowledge. And because it is very difficult subject matter, we have avoided it very carefully.
Professor (Hṛdayānanda): He does not see... He is disappointed because he does not see any difference between Hare Kṛṣṇa and all the other religions.
Prabhupāda: That's your business, but we find difference. And we have no also difference with other religion. Now, other religions, they are also searching after God. But religion, conception of religion, without God is not religion. Do you admit or not?
Professor (Hṛdayānanda): All the religions say they have knowledge of God.
Prabhupāda: Yes. Anyway, religion means searching after God.