So Kṛṣṇa, as Kṛṣṇa has got two businesses, paritrāṇāya sādhūnāṁ vināśāya ca duṣkṛtām . . . (BG 4.8). Two business. He is giving protection to the sādhus, to the devotees. Just like Kṛṣṇa is giving protection to the Pāṇḍavas, to the Vṛṣṇis, because they are devotees. And similarly He's killing Kaṁsa, Aghāsura, Bakāsura. I think His killing business was a major business than protection. From the life of Kṛṣṇa we see in the Kṛṣṇa book . . . so if you take in statistics how much time He devoted for killing and how much time He devoted for protecting, we shall see He devoted more time for killing. You see? So that is also Kṛṣṇa's business.
So those who are Kṛṣṇa conscious . . . killing, we don't mean that you take weapon. That is not possible in this age. Neither you have got the strength. If you kill, then you will be killed also. Not that. But there are two kinds of victory. By logic, by reason, by education you can kill their demonic propensities. That is also killing. If one is demon, and if you can turn into a devotee by your logic, by your arguments, then that is also, he's killed, his demonic principle is killed—now he's a saintly person. That is also killing. Not that . . . Kali-yuga, they're already very poverty-stricken, poor. So this physical killing is too much for them. They should be killed by argument, reason, scientific proposition.
This should be one of the propaganda of Kṛṣṇa consciousness movement. Because these people, the so-called scientist and philosopher, is misleading—misleading in this sense: that they have no information that everything is coming out from life. They are proposing that everything is coming from matter. Their basic principle, the original cause, original cause, they are find out some material adjustment.
The other day our . . . in the California University, one big man came. He's proposing same thing. So our Svarūpa Dāmodara proposed that "If we supply you all the ingredients, can you produce life?" He said: "I do not know." You see? He, in the category of "I do not know," and he's still a professor, he's a scientist. How he can be scientist if he do not know? If he's in the list of "I do not know," how he can be teacher? This is cheating. A teacher can be in the list of teacher if he does know: "Yes, I know." That is teacher. If he says, "I do not know," then what kind of teacher he is? He's a rascal, cheater. One must teach on the seat of a teacher if he knows things as they are. So that is going . . . one does not know things as they are; still, they have become teacher. That is the defect of the modern civilization.