So Arjuna, being kṣatriya, is so much embarrassed with the bodily concept of life; therefore Kṛṣṇa chastised him that, "You are not a very learned man. You are talking just like a learned man, but you are not learned man." So this conclusion is to be taken by us. That anyone within this world, if he has got bodily concept of life, he's not a learned man—he's a fool. So this world, at the present moment at least, it is a fool's paradise. Nobody is learned. Because everyone is working under the bodily concept of life. This is chastise. This is the first chastisement. Just like before giving lesson, if the student is writing or reading wrongly, then the teacher immediately says: "You fool, it is not like this. It should be like this."
So the first step Kṛṣṇa took in educating Arjuna . . . the Bhagavad-gītā is now being actually spoken, bhagavān uvāca. The first basic principle is explained to Arjuna that, "You do not know anything. Don't talk just like a learned man." But actually, that is our own . . . every one of us in the same position. Just like yesterday, two boys came. No philosophy; talking like nonsense, starvation, as if he has taken . . . what is called? Contract for stopping starvation. So he's starving, everyone is starving, this law . . . the nature will go on. Somebody . . . because there are three qualities of the nature—sattva-guṇa, rajo-guṇa, tamo-guṇa. So the natural laws will go on under the three laws. Therefore always we shall find three classes or three status of living condition. That will be explained in the Bhagavad-gītā. Even . . . everywhere there are different species of life. Everywhere these three qualities are working.
Just like there are some good trees. Good trees means which are producing nice fruits and flowers. They are good trees. And there are trees—no fruit, no flower, very long-standing. No use. No useful purpose. I've seen in Los Angeles, big, big palm trees, very long, but there is no fruit. In India there are palm trees like that, they bear fruit, very nice fruit, tāla, very sweet fruit. So any tree which does not give us nice fruit or nice flower, that is sinful. Amongst the trees also there are pious trees, there are sinful trees; amongst the animals also there are pious animals, sinful animals. Just like dog and the cow. Cow is pious animal and the dog is sinful animal. So nature's, amongst the birds, this crow is sinful bird. And the ducks, white swan, they are pious bird, the peacocks.