As a miser does not properly use his asset . . . suppose you have got one million dollar, you keep it only, you do not use it properly or you spoil it, then you are called miser. But if you utilize it properly and gain out of it, then you are intelligent.
Similarly, Garga Upaniṣad says, makes distinction, two classes. One class of men he says kṛpaṇa. Kṛpaṇa means miser. And another class of men he says brāhmaṇa, brahmins.
So he classifies, etad viditvāsmāt ya praiti sa brāhmaṇaḥ. This self-realization process . . . we shall die. It is sure. Every one of us will die. But we should not die like cats and dogs. That is the difference. We may die. We must die. Nobody can escape death. But before death we must know what is self and self-realization. They are brahmins.
Those who are trying to understand what he is, what is his relation with God and how he should live, they are called brāhmaṇas. And those who are living like cats and dogs, simply eating, sleeping, mating and dying, so they are dying like cats and dogs.
So death is inevitable. That is also advised by Prahlāda Mahārāja in his instruction to his class fellows, kaumāra ācaret prājño dharmān bhāgavatān iha (SB 7.6.1).
"My dear friends, from this beginning of life—we are now five years old—from this life we should try to understand bhāgavata-dharma." Bhāgavata-dharma means to understand our relationship with the Supreme Lord. That is called bhāgavata-dharma. Mānuṣam adhruvam. Tad apy adhruvam. Although the life is temporary, but it is very suitable for self-realization. So therefore one should begin this process from childhood.
Just like modern education system, if children are given some playthings, engineering . . . I've seen in your country especially; he's given railway line and so many things. He can understand how railway system is working, or engineering, so that from the very beginning of his life he's getting idea and he may catch up some line of activities. Similarly, this Kṛṣṇa conscious education also should be given from the very beginning of life.