They are not busy for earning money or going to the office or going to the factory or so many other sources of business. They are depending on Kṛṣṇa, and Kṛṣṇa is supplying them. Kṛṣṇa says, yoga-kṣemaṁ vahāmy aham, teṣāṁ nityābhiyuktānāṁ (BG 9.22): "If anyone is completely engaged in spiritual advancement of life then," yoga-kṣemaṁ vahāmy aham, "I take charge of yoga-kṣemam." yoga-kṣemam means what is not in possession, to supply that thing. And kṣema means what is already possessed, to protect.
So just like if a child is completely dependent on the father, parents, the parents has the sense that, "My child requires at this time this thing." They already there, already. He hasn't got to bother. The child does not know to ask from the parents, but the things are there. Similarly, Kṛṣṇa, He is supplying everything, everyone. Eko bahūnāṁ yo vidadhāti kāmān (Kaṭha Upaniṣad 2.2.13). Actually Kṛṣṇa is supplying everything, whatever you have got. We are eating . . . whatever we are eating we cannot manufacture in the factory. It is supplied by Kṛṣṇa. Eko bahūnāṁ yo vidadhāti kāmān. Everything is being supplied. What to speak of animal . . . human life? In the animal life the necessities are the eating, sleeping, mating and defending—everything is there.
Eating—there is enough fruit in the tree. The birds very nicely jumping over from one tree to another, eatings. Sleeping—they have got a nest; at night, without any disturbance, they sleep. Mating—with the birth they are two eggs, one male and one female. Sex life is there. And defending—they know. The bird, if you attack, they immediately go up. He knows how to defend. The . . . you see in the . . . (indistinct) . . . park, the swans, as soon as we are passing, immediately jump over the water. They know how to defend.