Unless one is not conversant with this principle of life, he cannot actually seriously take up what is Kṛṣṇa consciousness.
Athāto brahma jijñāsā. Those who are very intelligent persons, those who can understand what is the situation of our life, "What I am..." These things are very intelligent questions. Unfortunately, in the educational system anywhere in the world there is no system for infusing a student to inquire about this. Simply they are being carried away by temporary so-called happiness, concocted happiness. That is not very... That is the main principle of this instruction, that Ṛṣabhadeva says, "Now if you be carried away by this unscientific way of life, then your human form of life is spoiled, simply spoiled. Don't try to spoil your life. You have got the opportunity." This is intelligence. Just like if you are posted in a nice position, you try to utilize that position very intelligently. Just like if you have, anyone, although any post here is temporary, but anyone tries... Similarly, we should try to utilize this human form of life very intelligently.
There is another verse in the Viṣṇu Purāṇa, labdhvā su-durlabham idaṁ bahu-sambhavānte... That is the way of Vedic instruction. Everywhere you'll find. Labdhvā su-durlabham idaṁ bahu-sambhavānte. After many, many births... Unfortunately, they do not believe in the next birth, or past birth—always in ignorance. But that is a fact, and we are repeatedly exemplified that I am living. Although I am changing my body, I am living. Therefore, when I change this body, I shall continue to live. This is the bare truth. Why you do not understand? Life is continuous. Simply you are changing bodies. Now how I am preparing for the next nice body which is eternal? That is the problem of human life, not that to be carried away by cats and dogs and meat and fish and everything. No. This is the main theme of this instruction, that tapo divyaṁ putrakā yena, yena śuddhyet sattvam (SB 5.5.1). Tapo divyaṁ putra, putrakā yena sattvaṁ śuddhyet. Just try to purify your existence. Just like I gave you the list of purification from lowest stage of life to the highest, so, I mean to say, as the change of body, just like change of dress, you like a nice dress, giving up the old dress, similarly, change of body is going on. You accept the first-class body next life, first-class body next life which is eternal, which is not subjected to the tribulations of this body. That should be the aim of human civilization, not that simply getting money and spending for sense gratification. That is cats' and dogs' civilization. That is not human civilization. One should utilize the opportunity.