So Prahlāda Mahārāja concludes this instruction in this way: tato yateta kuśalaḥ kṣemāya bhavam āśritaḥ. Bhavam means this material world, where we take birth and die after some time. Bhavam. Bhavam means "become, manifest." This is material world. We take birth, we exist for some time, we grow, then there are some by-products, and then we become old and then die. This is called ṣaḍ-vikāra, six kinds of changes. But the ātmā is the same. The example is given: just like a tree, any tree, say a mango tree. During season, summer season there are flowers in the tree, and then they grow a small green mango, then it becomes yellow or reddish, and then it becomes ripened. Then there is a seed within the mango. And then, when it is over-ripened, it falls down. Then finished, business finished. Similarly... But when the mango is finished, it does not mean the tree is also finished. The tree is there, and again, in the next season, there will be mango and the same changes will go on. Similarly... It is a crude example. We spirit soul, we are eternal exactly like the tree. Tree is not eternal, but in comparison to the fruit, it is eternal. A tree lives for hundred thousand, five hundred, years and the same business go on. The mango, it is coming in fu..., just like flower, then green, then grows, then dwindles. So we are eternal, and our different bodies are just like seasonal fruits. On account of our different karma, we get different body. So this body is undergoing the six kind of changes. But the soul, he is not going any change. He is the same.
So here it is said that we are changing, bhava. Ever-increasingly we are taking birth. Janma-mṛtyu-jarā-vyādhi-duḥkha-doṣānudarśanam (BG 13.9). This is our actual distress, that we are obliged to take birth, death, disease, old age. So we are struggling against it. Nobody wants to become old man, especially in this winter season. It is very difficult for old men. So, but you have to accept jarā and vyādhi. Nobody can escape disease. Nobody can escape birth. Nobody can escape death. But struggle is going on. When you are diseased, there is a great struggle how to cure myself, go to the doctor, take good medicine and so on, so on. But we cannot check the diseased condition. Similarly, we cannot check our old age, cannot check our birth, death. Therefore here it is said, kuśalaḥ. Kuśalaḥ means if you actually want benefit, because this kind of struggling has not given you any benefit, but if you want actually benefit, kuśalaḥ, tato yateta, then you should endeavor for this. What is that? Ksemāya, for your ultimate benefit. And how long? Śarīraṁ puruṣaṁ yāvan na vipadyeta puṣkalam. So long you are stout and strong, you should try how to become free from this bondage of birth, death, old age and disease, not that you keep yourself, this business set aside: "When we shall get old then we shall chant Hare Kṛṣṇa and become Kṛṣṇa conscious." That is not the meaning. Immediately. Prahlāda Mahārāja said that kaumāra ācaret prājño dharmān bhāgavatān iha (SB 7.6.1). From the very beginning of life, when kaumāra, a small child, boy, from that age one should begin this bhāgavata life, or Kṛṣṇa consciousness. That is called brahmacārī, to teach brahmacarya from the very beginning of life. And when you are young, then you should work with more vigor and intelligence. At that time brain is very nice. Young man has got all the facilities. The machine is strong. This is a machine. So old machine cannot so work. So it is a great fortune for the young boys and girls of Europe and America that in this young life they are cultivating Kṛṣṇa consciousness. It is a very good fortune.