It was questioned by Arjuna to Kṛṣṇa that "How one man is forced to commit sinful activities." So Kṛṣṇa replied, kāma eṣa krodha eṣa rajoguṇa-samudbhavam. There are three modes of material nature: sattva-guṇa, rajo-guṇa, tamo-guṇa. So those who are in tamo-guṇa and rajo-guṇa, they are forced to commit sinful activities, forced. There is no alternative. Therefore we have to come. Just like we go to school, college for education. What is the purpose? That "We are ignorant. We are illiterate, uneducated. Therefore I must go to school to learn, to become enlightened." Similarly, from the lower animal status we are coming by evolution, and in the human form of life, especially in the civilized human form of life, the enlightenment is that one should come from this tamo-guṇa, rajo-guṇa to sattva-guṇa. That is required. Therefore the brahminical culture is so much adored in India to make one from the lower status of life to the higher status of life. And that is very easily done simply by devotional service.
That is stated here. Na adharmajaṁ dhṛdayam. Our heart is filled up with all dirty things, adharma. And it is very difficult to purify the heart, but it is possible, tad api. Even the hard-hearted, stone-hearted, rajo-guṇa, tamo-guṇa, can be melted, can be reformed. How? Īśāṅghri-sevayā. Īśa. Īśa means the Supreme Lord, Kṛṣṇa. Āṅghri means His lotus feet. Sevayā. This is possible. In the Bhagavad-gītā also, Kṛṣṇa says the same thing. Māṁ hi pārtha vyapāśritya ye 'pi syuḥ pāpa-yonayaḥ (BG 9.32). Pāpa-yoni. Puṇya-yoni means according to the infection of the heart with different qualities of these material modes of nature. That is called pāpa-yoni. One whose heart is too much engrossed with tamo-guṇa, rajo-guṇa, they are lower grade, pāpa-yoni. And gradually one who is free from the tamo-guṇa, rajo-guṇa... Even sattva-guṇa. Of course, sattva-guṇa is taken—the platform of goodness. That is the only hope in this material world, that one has to come by endeavor to the sattva-guṇa platform. Then the heart disease, kāma... hṛd-roga-kāma(?). It is a heart disease. Kāma means lusty desires simply to enjoy senses. This is called kāma. Hṛd-roga-kāma āpṛṇoti.
So the Kṛṣṇa consciousness movement means to cure the heart disease full with lusty desires. This is Kṛṣṇa consciousness.