Milk is nothing but blood of cow. But we know the art, how to drink the blood of cow without killing. That is civilization. That is civilization. Medically, they say the cow's blood or bull's blood is very effective, and that is accepted. But you must know the art.
It is the arrangement of God that cow's milk . . . cow's own milk, she does not drink. She eats grass. That means God's arrangement is like that, that "Let the human being drink the milk of cow, and the cow may eat grass." Because they haven't got good brain. Foodstuffs should be given, nice foodstuff given, should be given to the particular person for developing nice brain. Milk is a foodstuff which can develop your finer tissues of the brain so that you can understand higher philosophy. And if you become blunt, and you eat meat by killing any animal, then how you will understand? The finer tissues given in the human form of life for understanding spiritual things . . . you cannot.
Vinā paśughnāt. Therefore Parīkṣit Mahārāja says, vinā paśughnāt. Nivṛtta-tarṣair upagīyamānād bhavauṣadhāc chrotra-mano-'bhirāmāt, uttamaśloka-guṇānuvādāt (SB 10.1.4). Uttamaśloka, Kṛṣṇa, guṇānuvādāt, glorifying His activities, who can be bereft of this opportunity, vinā paśughnāt, unless he is a animal-killer? Unless he is animal-killer, nobody will deny to hear about Kṛṣṇa. Because the animal-killers, they have lost their brain. But Caitanya Mahāprabhu's mercy is so great that even who has lost his brain, he can be revived by hearing Hare Kṛṣṇa mantra. That is Caitanya Mahāprabhu's . . . ceto-darpaṇa-mārjanam (CC Antya 20.12). Yes, in this age everyone is fallen. But he can be, I mean to say, elevated to the position of nice brain. How? By paraṁ vijayate śrī-kṛṣṇa-saṅkīrtanam. Simply by chanting.
So in this age everyone is blunt-headed, animal-killer. They cannot understand what is kṛṣṇa-kathā, what is spiritual life. We see actually: they are not at all interested. They feel disturbance: "What these people are chanting Hare Kṛṣṇa?" They cannot make any solution of the problems. Just like Atreya Ṛṣi was speaking that government is embarrassed how to solve the question of intoxication, LSD-taking. They could not. Huge amount they are spending. But here is the remedy, they will not take. Why? Paśughnāt, killing, animal-killers. So animal-killer cannot take it. Vinā paśughnāt (SB 10.1.4). Vinā means without. Unless one is animal-killer, he cannot give up this opportunity of hearing about Kṛṣṇa. Therefore we forbid, "No meat-eating." This is the qualification. Unless you stop meat-eating, you cannot understand. Blunt head.