In the Bhagavad-gītā it is said, pravṛttiṁ ca nivṛttiṁ na vidur āsura-janā (BG 16.7). Asura-janā, those who are demons, they do not know these two things, pravṛtti and nivṛtti, what is our duty and what is our not duty. Pravṛttiṁ ca nivṛttiṁ ca . . . that is modern civilization. They do not know. What is our duty to do and what is our duty not to do, they do not know. Neither any education in this life what we should do, what we should not do.
So therefore this particular word is mentioned here, manīṣiṇām. In human society, those who are specifically intelligent, for them. Caitanya-caritāmṛta kāṛ, he says, kṛṣṇa yei bhaje sei baḍa catura. Catura means very intelligent. Without being intelligent, nobody can take to Kṛṣṇa consciousness. But our propaganda is to educate people to become intelligent. They are foolish. They do not know the value of life. They do not know what is going to happen after death. No. Just like cats and dogs.
Therefore Upaniṣad says, Gargopaniṣad, etad viditvā yaḥ prayāti sa brāhmaṇaḥ: "One who leaves this body after knowing everything, he is brāhmaṇa." And etad aviditvā yaḥ prayāti sa kṛpaṇaḥ: "Or anyone who dies without knowing the value of life, he's kṛpaṇa, miser, cripple-minded," because he could not utilize the opportunity given to him by nature. Such nice, beautiful body, you American boys and girls—nice country, good facilities, no poverty—everything is very nicely given to you. But, if in spite of all these facilities, if you don't take to Kṛṣṇa consciousness, then you are kṛpaṇa, miser.
"Miser" means one who has got money, but he cannot utilize it. He is miser. And one who knows how to utilize money . . . there are many merchants, they get a few thousands of dollars from their father, but due to intelligence he increases to millions of dollars. That is intelligence. And miser, or foolishness is that, "I get some money from my father, but I spend it for nothing."