(Click to enlarge photo of Srila Prabhupada)
Prabhupāda: If I am trained in Kṛṣṇa consciousness, then I am a sane man. I am not a madman because I know what is my position, what is God, what are other living entities, what is this world, what is this material nature, what is this time, what are these activities. This knowledge is in full because Kṛṣṇa consciousness teaches all these things, what is God, what you are, and then what is this nature, beyond the nature, what other things are there. Those who are not Kṛṣṇa conscious, they do not know. They are frogs of the well, simply calculating, "This three feet, water, space, is my habitation." And when he's given information of the Atlantic Ocean, he does not believe. "Oh, there is Atlantic Ocean? What is that nonsense?" "Oh, it is very, very big," somebody says. He's simply calculating his well water. "Oh, it may be four foot?" "No, very big." "All right, ten feet? How...?" He's calculating, this. These materialistic scientists, they are simply speculating like the frog in the well. They do not know; neither they have means. But a Kṛṣṇa conscious person knows. He gets information from Kṛṣṇa.
kiṁ jñātena tavārjuna
viṣṭabhyāham idaṁ kṛtsnam
ekāṁśena sthito jagat
"Now, this material world is simply a fractional part of My creation." And what is this material world? This material world, we cannot even estimate one universe, what is the length and breadth and how many planets are there, how they are working. We have no information. And we are very proud of advancement of knowledge. And there are innumerable universes. All taken together, that is called material world. Yasya prabhā prabhavato... (Bs. 5.40).
In the Brahma-saṁhitā we get this information: yasya prabhā prabhavato jagad-aṇḍa-koṭi. Jagad-aṇḍa. Jagad-aṇḍa means universes. Koṭi means innumerable, hundreds of thousands multiplied by another hundred, hundred, hundred. Lord Caitanya Mahāprabhu has said that this universe is a grain of mustard seed in the bag of a mustard seeds. Just imagine. Can anyone count what is the number of mustards seeds in a bag, in a one-ton or two-ton bag? Innumerable. It is beyond our experience. But there are so many universes just like packed up in a bag. This is called material world. So what to speak of the spiritual world? The spiritual world is at least three times greater than this material world. That information we get from Bhagavad-gītā. Ekāṁśena sthito... Ekam means one part. Even you take... One part, maybe, one hundred. But even not going so far, one part means divide the whole thing into four parts. That will be one fourth. This material world is only one fourth of the whole creation, and the three-fourth part is spiritual world. In the spiritual world there is similarly innumerable planets, innumerable living entities.
Just like, as I have already explained, that this material world is the just like prison house of the criminals. So our criminal department in the state, say, jail or prison house, that is not the countrywise, as big as the country. That is a fractional part only. Maybe a few hundred people or few thousand people living there, but the state is very big. Similarly, the Lord's state is so big, though the criminal living entities are living in a corner only. This material world is in a corner. So what information we can get about God? "God is great," we simply theoretically say, but we do not know how great it is, He is, and how His greatness is working. That we do not know. But Kṛṣṇa conscious persons, because they are getting knowledge from Kṛṣṇa directly, they have got all this knowledge. Therefore their knowledge is perfect.
(Srila Prabhupada Lecture, Hawaii, March 23, 1969)