- mamaivāṁśo jīva-loke
- jīva-bhūtaḥ sanātanaḥ
- manaḥ-ṣaṣṭhānīndriyāṇi
- prakṛti-sthāni karṣati
- (BG 15.7)
He is struggling hard within this material nature because he is not serving Kṛṣṇa. Therefore his punishment is to struggle hard in different species of life. There are 8,400,000 species of life, and he is transmigrating, but becoming happy this way or that way, that way, that way.
Just like you have come to America to become happy. Is it not? Otherwise why you left? Similarly, we are transmigrating from one country to another, one planet to another, one body to another, searching after happy, happiness. That is struggle for existence. So Kṛṣṇa says: "They are My part and parcel. Instead of serving Me, they are serving their mind and senses." Manaḥ-ṣaṣṭhānīndriyāṇi prakṛti-sthāni karṣati (BG 15.7).
So long we serve our senses and mind, we remain in this material world, prakṛti-sthāni. And as soon as we revive our real consciousness, Kṛṣṇa consciousness—we serve Kṛṣṇa—that is liberation. Sarva-dharmān parityajya mām ekaṁ śaraṇaṁ vraja (BG 18.66). That is the ultimate instruction. So instead of serving the senses, kāmādīnāṁ kati na katidhā, just like serving the country, serving the family, something, the wife, and serving the husband, serving the father—all the services are different phases of kāma. Kāmādīnāṁ kati na katidhā pālitā durnideśāḥ. So at the present moment we are serving our senses. When the sense service will be transferred to Kṛṣṇa, that is liberation. And this is bondage.