Śrīla Prabhupāda.  Formerly leaves and twigs were growing from this tree. Now they are not. How would the scientists explain this?
Karandhara.  They would say the tree's chemical composition has changed.
Śrīla Prabhupāda.  To prove that theory, they must be able to inject the proper chemicals to make branches and leaves grow again. The scientific method includes observation, hypothesis and then demonstration. Then it is perfect. But the scientists cannot actually demonstrate in their laboratories that life comes from matter. They simply observe and then speak nonsense. They are like children. In our childhood, we observed a gramophone box and thought that within the box was a man singing, an electric man. We thought there must have been an electric man or some kind of ghost in it. [Laughter.]
Dr. Singh.  One of the popular questions that arises when we start studying biology is "What is the difference between a living organism and that which is not living?" The textbooks say that the chief characteristics that distinguish the two are that a living being can move and reproduce, whereas dead matter can do neither. But the books never talk about the nature of the soul or about the consciousness of the living entity.
Śrīla Prabhupāda.  But consciousness is the primary indication that life is present. Only because of consciousness can a living being move and reproduce. Because a person is conscious, he thinks of marrying, and begetting children. And the original consciousness is described in the  Vedas: tad aikṣata bahu syām  ( Chāndogya Upaniṣad  6.2.3). This means that God, the original conscious being, said, "I shall become many." Without consciousness, there is no possibility of by-products.
The Individual Living Force
Śrīla Prabhupāda.  The gardeners supply water to the green trees, so why don't they supply water to this dead tree and make it green?
Dr. Singh.  From experience they know that it will not grow..
Śrīla Prabhupāda.  Then what is the element that is lacking? Scientists say that chemicals are the cause of life, but all the chemicals that were present when the tree was alive are still there. And these chemicals are still supporting the lives of many living entities such as microbes and insects. So they cannot say that life energy is lacking in the body of the tree. The life energy is there.
Dr. Singh.  But what about the life energy of the tree itself?
Śrīla Prabhupāda.  Yes, that is the difference. The living force is individual, and the particular individual living entity that was the tree has left. This must be the case, since all the chemicals necessary to support life are still there, yet the tree is dead. Here is another example. Suppose I am living in an apartment, and then I leave it. I am gone, but many other living entities remain there-ants, spiders and so forth. So it is not true that simply because I have left the apartment, it can no longer accommodate life. Other living entities are still living there. It is simply that I am individual living being-have left. The chemicals in the tree are like the apartment: they are simply the environment for the individual force-the soul-to act through. And the soul is an individual. I am an individual, and therefore I may leave the apartment. Similarly, the microbes are also individuals; they have individual consciousness. If they are moving in one direction but are somehow blocked, they think, "Let me go the other way." They have  personality .