Kṛṣṇa-praśna means all-including, everything—past, present, future, moving, not moving, and big and small. This is Kṛṣṇa understanding. Kṛṣṇa understanding means past, present, future, small, large, moving, not moving. This is Kṛṣṇa understanding. But everything is in either of these categories. Everything must be either in the past or at present or in future. So this is past, present and future. And there are moving and . . . just like we. We are, animals or man or birds and beasts and insect or aquatics, we are moving. And there are not moving, just like the hill, stones, the trees, plants, the grass. They do not move. But we are moving. So moving, unmoving. And we exist past, present, future. And there is biggest, bigger than the biggest, the whole universe. Although you have got airships, you cannot go, neither others. So many machines have been discovered, but go and see the . . . they cannot go even to the moon planet, what to speak of others. Therefore it is very big for us. When we speak of universe, we cannot think of. They simply calculate, the scientists, by light-year and this year, that year, the speed. But we cannot approach even in this material world, and what to speak of Kṛṣṇa? Kṛṣṇa is in the spiritual world. We cannot calculate the length and breadth of this material world, our knowledge is so imperfect and meager, and what we can understand of the spiritual world? The material world is a manifestation of Kṛṣṇa's one-fourth energy. And the three-fourth energy is manifested in the spiritual world. This is the understanding of Kṛṣṇa.
Therefore when one inquires about Kṛṣṇa, he is very glorified. Therefore he says, varīyān eṣa te praśnaḥ. Varīyān eṣa te praśnaḥ kṛto loka-hitam (SB 2.1.1). Because answer to this question will include everything, and people will profit there, loka-hitam. The saintly person duty is to do welfare to the people in general. That is saintly person.