Foolish means that, that he's going to hell, but he's thinking, "improving." Foolishness means mūrkhāyopadeśo hi prakipaya na śāntaye (?). Mūrkha, a rascal, if you give him good advice, he'll be angry.
Morning Walk -- December 7, 1973, Los Angeles:
Svarūpa Dāmodara: In the future they are going to make plastic houses.
Prabhupāda: Yes.
Svarūpa Dāmodara: Transparent, you can see everything from the house.
Prabhupāda: So what is the credit there?
Svarūpa Dāmodara: They say that is an improvement.
Bali Mardana: But the plastic depends on oil.
Prabhupāda: That is their foolishness. They are going to hell and still they are thinking, "improvement." This is their foolishness. Foolish means that, that he's going to hell, but he's thinking, "improving." This is their...
Dr. Wolfe: Śrīla Prabhupāda, wouldn't it be more sincere if these people, these scientists said, "We don't want to be taken out of this dream, that with our senses and with all the machines built on senses we will be able to make it"? But they don't want to be taken out of that dream.
Prabhupāda: But that is their foolishness.
Dr. Wolfe: They don't want to admit it even.
Prabhupāda: Why not? They have to admit Just like I gave you the example that you cannot see how many stars are there, but there are. If you say, "I don't see it, I don't believe it," that is your foolishness. That is your foolishness. You have to admit that your senses are limited. They are not perfect. That is the four defects of the conditioned soul: he commits mistake, he is illusioned, he cheats, and his senses are imperfect.
Dr. Wolfe: But they say they try and try again.
Prabhupāda: No, try, how? How can you? You are diseased person. Suppose you are suffering from cataract disease. So you can try, try, try, try. Will you be cured? You'll never be cured. You must go to a physician. He'll operate, surgical operation. Then there is chance of seeing. You cannot, trying, trying, trying, trying. Then you go on trying, but you'll never be cured.
Dr. Wolfe: But that is just what they do not want to accept.
Prabhupāda: Yes. That is foolishness. That is foolishness. They do not take good advice. That is foolishness. Foolishness means mūrkhāyopadeśo hi prakipaya na śāntaye (?). Mūrkha, a rascal, if you give him good advice, he'll be angry. Just like a serpent, if you bring the serpent and if you tell the serpent, "My dear friend serpent, you live with me. I shall give you daily nice food, milk and banana. You'll be very pleased." So the result will be that his poison will increase. One day he'll say, "Phaḥ! Phaḥ!" (laughter) So these rascals are like that.
Svarūpa Dāmodara: But they won't give up hopes. They are always hopeful.
Prabhupāda: That is foolishness. Their hopes are being frustrated every moment; still, they are hoping. That is foolishness.