Now take for example the atheistic theory—call it by any name—that combination of matter makes a living symptom possible. So scientific, I mean to say, proposition is based on observation and experiment. So this is simply observation, that those who are atheistic person . . . just like medical science: There are many doctors. They are observing when a man dies, observing, feeling the pulse, taking pulse beating, offering oxygen gas, trying to save him.
All of a sudden the man dies—and he is sure to die—but they cannot simply observe the symptoms. They cannot observe what is that thing which is gone now. They cannot say that. Neither it is possible for them to say. But their theory that combination of matter makes symptoms of life possible, they should prove it by experiment. Then it is complete science. Observation and experiment.
But there is no such experiment till now. You trace out the history of the human society . . . of course, in the modern world they cannot trace out chronological history more than three thousand years. That's all. But we can give account for many millions and millions of years. Just like in the Bhagavad-gītā Kṛṣṇa says, imaṁ vivasvate yogaṁ proktavān aham avyayam (BG 4.1): "I spoke this philosophy of Bhagavad-gītā to the sun-god." Now just imagine how many years, millions of years.
So the modern theory that ten thousand years ago there was no human civilization, how we can adjust things? The Battle of Kurukṣetra was fought five thousand years ago. Before that, hundreds of thousands year ago there was another battle, which is called fight between Rāma and Rāvaṇa.
And there are so many instances in the Vedic literature. We can offer history of the world, of the universe, from millions and millions of years ago. But these people with petty knowledge for three thousand years or four thousand years, they are thinking they have advanced.
So this theory was current in those days also; otherwise why Kṛṣṇa is making reference to this theory? So all kinds of theories are existent since the beginning of this creation. But sometimes some theory is very prominent, sometimes some theory is not prominent. That's all.
So this atheistic theory, that combination of matter . . . just like you combine some chemicals and you get some product, similarly, the modern scientist says that carbon dioxide, soda bicarb—they name so many chemicals—is the combination of this body. That is chemical analysis of this body. But can you produce? You have got all the chemicals.