If you want to remain in the middle planetary system, then that is rajo-guṇa. And jaghanya-guṇa-vṛtti-sthā adho gacchanti tāmasāḥ. And those who are working in tamo-guṇa, jaghanya, most abominable behavior, they will go to the animal kingdom or the lower planetary system. This is the process. As you are contaminating, kāraṇaṁ guṇa-saṅgo 'sya sad-asad-janma-yoniṣu (BG 13.22). Sat and asat-janma. Why there are so many varieties of life? Cats, dogs, trees, aquatics, birds, beasts, human beings, demigods, civilized, uncivilized, so many. Why there are so many varieties? Kāraṇaṁ guṇa-saṅgo 'sya. As he is associating with different types of qualities, he is getting a different types of body. This is going on. Therefore Caitanya Mahāprabhu says:
- ei rūpe brahmāṇḍa bhramite kona bhāgyavān jīva
- guru-kṛṣṇa-kṛpāya pāya bhakti-latā-bīja
- (CC Madhya 19.151)
Caitanya Mahāprabhu says: "The living entity is rotating within this universe," brahmāṇḍa bhramite. Sometimes this planet, sometimes that planet, sometimes this body, sometimes that body. In this way he is rotating from time immemorial. But by chance, fortunate, by fortune, if he gets in touch of a proper guru and then he gets Kṛṣṇa . . . guru-kṛṣṇa-kṛpāya. By Kṛṣṇa's mercy, he gets guru, and guru's mercy, he gets Kṛṣṇa, simultaneously—if he is actually serious about Kṛṣṇa, Kṛṣṇa consciousness. This is important, therefore, when we hear about Kṛṣṇa . . . therefore sat-saṅga is required, to awaken that Kṛṣṇa consciousness, dormant Kṛṣṇa consciousness within everyone's heart. Everyone's heart, there is. Because he is part and parcel of Kṛṣṇa.
Just like a boy who has left his home from childhood. Somehow or other, he is separated from his rich father, loitering in the street. But he is reminded. He can remember. Similarly, we are all sons of the most opulent father. Aiśvaryasya samagrasya vīryasya yaśasaḥ śriyaḥ (Viṣṇu Purāṇa 6.5.47). Unfortunately, we have forgotten. We are thinking that, "I am American," "I am Indian," "I am this," "I am that," and toiling and laboring hard, struggle for existence. Therefore the most beneficial welfare activity is Kṛṣṇa consciousness. We are reminding people that, "You are son of such great personality, or Kṛṣṇa. Why don't you go back to your home? Why you are rotting in this material world, suffering?" This is the mission.
So required, this education. When one understands that, "I am rotting here in this nasty place . . ." This is a nasty place. Not only this material planet; anywhere within this material world . . . Ābrahma-bhuvanāl lokāḥ punar āvartino 'rjuna (BG 8.16). Even if you go to the Brahmaloka, where the duration of life you cannot calculate and the standard of life is very, very good, but still, ābrahma-bhuvanāl lokāḥ punar āvartinaḥ, wherever you go, the janma-mṛtyu-jarā-vyādhi (BG 13.9) is there. You cannot avoid it. So this information, Kṛṣṇa consciousness, is even up above Brahmaloka. Therefore it is the most beneficial welfare activities in the world, Kṛṣṇa consciousness, to awaken Kṛṣṇa consciousness.