Real intelligent person is he who is satisfied what Kṛṣṇa has given him, "If Kṛṣṇa wants, He will give me more. Let me become Kṛṣṇa conscious. Let me study about Kṛṣṇa. Let me chant about Kṛṣṇa. Let me hear about Kṛṣṇa. Let me see with my eyes Kṛṣṇa, the Deity Kṛṣṇa. Let me engage my hands in worshiping Kṛṣṇa, in cleansing the temple, my hands. Let my legs be engaged in going to the temple." In this way all our senses should be engaged in the service of Kṛṣṇa. That is our real business. Tasyaiva hetoḥ prayateta kovido na labhyate yad bhramatām upary adhaḥ (SB 1.5.18). Tasyaiva hetoḥ: "For that purpose only." Which purpose? Which we could not achieve after wandering the whole universe, up and down.
The living entity is wandering, by transmigration from one body to another, up and down. Sometimes he is becoming Brahmā even. Brahmā, Indra, Candra, he can become. One can become. By pious activities, you can be raised to the position of Brahmā, Indra, Candra, demigods, big, big demigods. And by impious activities you can go down to become the worm of a stool. This is going on. This is called bhramatām upary adhaḥ. Upari adhaḥ. Adhaḥ means down, and upari means up. So ūrdhvaṁ gacchanti sattva-sthāḥ (BG 14.18). Who are going to up, upper planetary system? Sattva-sthāḥ: those who are qualified brāhmaṇas, strictly following the principles, satya śamo dama tittiska ārjava eva ca jñānaṁ vijñānam āstikyaṁ brahma-karma svabhāva-jam (BG 18.42).
If you follow these principles—controlling the senses, truthful, clean, full of knowledge, believing in the śāstra and God, and vijñānam, practical application of knowledge in life, vijñānam . . . simply to know is useless. You must practically apply in life. That is called vijñānam. Practical examination. Those who are science students, in B.Sc., they have to give . . . pass theoretical knowledge and practical knowledge also. Simply theoretical knowledge, "So much hydrogen, oxygen makes water," that is theoretical. But when you mix up hydrogen, oxygen gas, and actually prepare water, that is called practical. So that is science. Science means simply theoretical knowledge is not sufficient. Observation and experiment, experimental knowledge. That is called vijñānam.
So by practical knowledge you should be well acquainted with God. That is brāhmaṇa's business. So sattva-sthāḥ, those who are strictly following the brahminical principles, they will be situated in upper planetary system. Ūrdhvaṁ gacchanti sattva-sthāḥ (BG 14.18). But a Vaiṣṇava is above these. Mad-yājino yānti mām (BG 9.25). Those who are following these principles with an aim for higher planetary system, they can go, elevated. Similarly, those who are trying to go back to home, back to Kṛṣṇa, they can also go. It is not very . . .
This process, our Kṛṣṇa consciousness movement, is to help people to go back to home, back to Kṛṣṇa. It is not very difficult. Why it is difficult? Kṛṣṇa says, janma karma me divyaṁ yo jānāti tattvataḥ (BG 4.9). Try to understand Kṛṣṇa in truth, not vaguely. Kṛṣṇa is the Supreme Personality of Godhead. We think of God. So why don't you accept Kṛṣṇa? He says and śāstra says, the ācārya says, Vyāsadeva says, Nārada says, your Guru Mahārāja says. Why not accept? Why rascaldom? Why you are searching after any other God? Here is God. Name, address, activities, everything is there, authorized statement of the Vedas. So is there any difficulty to understand Kṛṣṇa? But these rascal will not take it.
Persistent. "Oh, why Kṛṣṇa can be accepted? I have got a God, manufactured." This is misfortune. Durbhaga, durbuddhi, miscreant, rascal. That is stated in the Bhagavad-gītā: na māṁ duṣkṛtino mūḍhāḥ prapadyante narādhamāḥ (BG 7.15). These are the qualification of persons who do not surrender to Kṛṣṇa: miscreants, mischievous, sinful, mūḍha, rascal, asses, narādhama, lowest of the mankind. These are the qualification. So they are all durbuddhi.
Human life is meant . . . this is an opportunity to understand Kṛṣṇa.