Arjuna is asking the Supreme Personality of Godhead that "You teach me." That is perfect teaching. If you learn something from Kṛṣṇa, or from His representative, that is perfect. That is perfect knowledge. All other knowledge that you gather, that cannot be perfect. Because unless you are perfect, how you can give perfect knowledge? So every one of us is imperfect. Because we have got imperfect senses. So with imperfect knowledge...
Just like the so-called scientists, philosophers, they propose their theories; "I think," "It may be like this," "Perhaps..." These are not knowledge. These are all nonsense. You must speak definitely if you know. Just like the śāstra says: jalajā nava-lakṣāṇi. Definitely. Nine hundred thousand species of life within the water. Why? You could say: "About nine lakhs." No. Nine lakhs. Not about. More or less. No. Not like that. That is knowledge. That is perfect... Jalajā nava-lakṣāṇi sthāvarā lakṣa-viṁśati. And the trees, plants, they are two millions. Never says: "approximately." "Maybe," "perhaps." No. This is all nonsense. We don't accept such knowledge. So... But the, in the material world, these things are going on. Any rascal will give some theory. That will be accepted and he'll be offered Nobel Prize.
So that is condemned in the Śrīmad-Bhāgavatam: śva-viḍ-varāha-uṣṭra-kharaiḥ saṁstutaḥ puruṣaḥ paśuḥ. So according to Bhāgavata direction, these Nobel Prize winners are exactly like dogs, camels, hogs, śva-viḍ-varāha-uṣṭra and asses. And they are praised by similar animals. That's all. The Nobel Prize winner and the Nobel Prize giver. Both of them are like dogs hogs animal and asses. That's all. This is a fact. They... If, if a person has written some theory, evolution of chemicals, and all rubbish things, it is very nice thing for the so-called dogs and camels, but those who have got eyes to see, one who has heard from Kṛṣṇa, he'll understand this is nonsense. How, from chemical, you can produce life? When he's asked: "Well, sir, if I give you these chemicals, can you produce life?" Immediately he says: "That I cannot say." Why?
It is actually happening. In California University. One big professor, came, lecture, and he said that:. "By combination of these four chemicals, life has begun." So one of our students, he's also doctor in chemistry, he asked him immediately: "Sir, if I give you all these chemicals, whether you can produce life?" His answer was; "That I cannot say." Why? "That I cannot say." Then why you are proposing all this nonsense? If you do not know definitely... "No, we are trying." "In future..." This is going on. "In future." But in the common saying: "Trust no future, however pleasant." Why future? Now, what you have learned, speak that.