Prabhupāda: Now, here it is said that surākṛtam, a drop of wine makes the whole thing impure. And liquor drinking is our daily business. So the example is given that suppose here is one drop of wine, and the place has become impure. So if you bring another gallon of wine and just sweep over it, mop it with wine, that is not the process. You have to bring pure water and wash with it. Then it will purify. You cannot say that "Wine is also liquid. Why not cleanse it here by wine?" No.
So the Vedic conception is completely different. The... According to modern science, they put things into alcohol to sterilize. Is it not?
Svarūpa Dāmodara: Put alcohol in things.
Prabhupāda: Yes. But it becomes more impure. Anything you put into alcohol, that becomes more impure, according to this. So there are so many things. Our position jīva, is living entity, is pure by nature because it is part and parcel of God, Kṛṣṇa. So we have accumulated so much, so many material things by which we have become impure. And yajñaiḥ. This bhūta-hatyā. Bhūta-hatyā is also recognized here as sinful activities. As wine is sinful or impure—if not sinful, it is impure—bhūta-hatyā, killing of animal, is also sinful activities. So you cannot counteract by performing yajña, because in the yajña there is also another bhūta-hatyā.