Kṛṣṇa is person, and Vivasvān the sun god is also person. Otherwise how Kṛṣṇa could speak to him? Imaṁ vivasvate yogam. How He instructed him? Just like exactly Arjuna was instructed by Kṛṣṇa. Kṛṣṇa is person and Arjuna is person. Person-to-person talk. Similarly, that predominating deity in the sun planet is also a person, and there are many other persons. Just like when Kṛṣṇa and Arjuna talked, there were many, many other individual persons. Similarly, in the sun planet, not only the sun god himself is a person, but all the population there, they are like sun god, made of fire, their body is made of fire, they can stay in the fire. Just like the fish, their body is so made that they can live within the water. Similarly, there also there are many, many living entities. The sun planet is very, very big, fourteen hundred thousand times bigger than this earth. So it is all congested with population. And because they are all fiery, everything made there fiery, therefore it is a blazing fire, and the illumination is coming all over the universe.
But they cannot understand this, the so-called scientists. It is not . . . Beyond their conception. But this is a fact. And the moon planet is also fiery, exactly like the sun. Therefore that illumination is distributed. But the difference is, so far I can remember, that the moon planet fire is surrounded by cool atmosphere. Because the heat is coming through some cool atmosphere, it is at night so pleasing. It is not vacant. There is also living entity. This is one of the heavenly planets. Heavenly planet begins from the sun, then moon, then Mars, Jupiter, like that. We have challenged this, that moon planet is beyond the sun planet. The moon planet is not the first planet. The sun is first, moon is second. So we have to learn from Vedic literature all this information. Many, many millions of years ago this Vedic literature was given to us. So about these planetary system, everything is there, described. It is not unknown.
So anyway, our point is, either the sun or the moon, they are localized. They are situated in one place, we can see. But the illumination, the heat or the cool illumination . . . Sun illumination is hot, and moon illumination is cold, very soothing. Kṛṣṇa is so kind that both things are there, and both things are required. It is not that unnecessarily. No. Kṛṣṇa says, raso 'ham apsu kaunteya prabhāsmi śaśi-sūrayoḥ (BG 7.8). This prabhā, this illumination, the light coming from the moon, from the sun, śaśi-sūrayoḥ . . . Śaśi means the moon, and sūrya means the sun. So those foolish persons who are challenging, "Can you show me God?" the rascal, why don't you see God here, śaśi-sūrayoḥ? You do not see the sunshine, the moonshine? Why do you say that "I did not see God"? Huh? What is this argument? If Kṛṣṇa said, God said, "Here I am. I am the moonshine, I am the sunshine," why don't you see Him? Huh? You have to see according to your capacity. You cannot see with your, these present eyes the Supreme Personality of Godhead. That is not possible. Now you see the illumination of God, that's all. Just like, practical, we can experience the sunshine. Everyone knows what is sunshine, but everyone is not aware of the temperature of the sun or the person within the sun. But that's a fact. Otherwise, Kṛṣṇa is liar. Kṛṣṇa said, "I spoke this philosophy to the sun god." So sun god is there, that's a fact. And the . . . If the sun god is there, his devotees or his associates are also there.
So far we get information, all the planets, they are full of living entities. Janakīrṇa. It is stated in the Vedic literatures, janakīrṇa. Janakīrṇa means congested with living entities. Therefore we see New York City is congested with so many living entities. But if you go higher, then you cannot appreciate how New York City is so congested, or other cities are congested. So similarly, we have no knowledge of these planets, but every each and every planet, millions and trillions, they are all congested, full with living entities. This is Vedic information. It is not imagination, imperfect imagination. No. It is fact. So we learn from the śāstra that on account of illumination of the moon, the vegetation in every planet is, I mean to say, flourishing condition, due to the moon. Still we find reaction of the moon on the waves of the seas and ocean. So everything has got its necessity. Parasya brahmaṇaḥ śaktir (CC Madhya 20.110). They are all acting as potency of the Supreme Lord. Parasya brahmaṇaḥ śaktir. They are śakti; they are not śaktimān or śaktimā (?). Śaktimān means one who possesses the potency. And we are all śaktis.
Caitanya Mahāprabhu is going to explain the potency of the Lord—three potencies: spiritual potency and material potency and the marginal potency. How they are acting, throughout the whole cosmic manifestation, beyond that also, that very simple word, everyone can understand. The light is here, the bulb is here, localized, but the illumination is spread. And we can take advantage of the illumination. By the sun's illumination we see practically how trees are growing their leaves, their color. Everything is due to the sunshine, we have got practical experience. Where there is no sunshine, especially in these countries, all the leaves fall down, and as soon as there is sunshine, immediately millions and trillions of leaves come out. Immediately. Not that waiting. Immediately. At least in this way you have to understand how Kṛṣṇa's potency is working. That is the Vedic information, parasya brahmaṇaḥ śaktir. Parāsya śaktir vividhaiva śrūyate svābhāvikī jñāna-bala-kriyā ca (CC Madhya 13.65, purport), (Śvetāśvatara Upaniṣad 6.8). Just like the sunshine is the potency of the sun, and how it is acting wonderfully. Everything is perfectly—the flowers, the leaves—perfectly done. Svābhāvikī jñāna-bala-kriyā ca. It doesn't require any research work how this leaf has come out. It is coming out automatically. They cannot understand. They say, "Automatically." No automatically. There is the working of the potency, but it is so perfect that svābhāvikī, as if natural, coming out. Everywhere you'll find, in your body also, potencies. You shave your head; immediately next day again coming out, again coming out. But you do not know. Let the scientist say how it is coming out, his own hair, what to speak of others.