(Prabhupada's lecture - Śrīmad-Bhāgavatam 1.16.19 - Hawaii, January 15, 1974)
So so many symptoms are described, but at the end the remedy is suggested because śāstra means it will guide you for the ultimate goal of life, for the perfection of life. So if the world condition is so bad, then how people will be saved? That is also suggested in the śāstra: kaler doṣa-nidhe rājann asti hy eko mahān guṇaḥ. Parīkṣit Mahārāja was advised by Śukadeva Gosvāmī, "My dear King, I've described so many faults. It is like the ocean of faults. But there is one boon also. That is special prerogative, special advantage of this age." Kaler doṣa-nidhe rājann asti hy eko mahān guṇaḥ. Kalau, kalau means "In this age of Kali, it is full of faulty things. But there is one boon." What is that? Kīrtanād eva kṛṣṇasya mukta-saṅgaḥ paraṁ vrajet [SB 12.3.51]. Kīrtanād eva kṛṣṇasya: Simply by chanting the holy name of Kṛṣṇa—Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare—simply by chanting the holy name...," kīrtanād eva kṛṣṇasya, kṛṣṇasya, so, mukta-saṅgaḥ, "he becomes free from all these contaminations, by one thing, simply chanting Hare Kṛṣṇa." Kīrtanād eva kṛṣṇasya mukta-saṅgaḥ. There are so many contaminations, so many faults of this age, but simply by chanting Hare Kṛṣṇa mahā-mantra, one becomes kīrtanād eva kṛṣṇasya mukta-saṅgaḥ, he becomes free from the contaminated association.
Just like if there is some epidemic, disease, and if you take vaccine, it is supposed that you are free from the contamination. So this vaccine of chanting Hare Kṛṣṇa mahā-mantra will keep you fit without any contamination of this age of Kali. And that is happening. All over the world people are chanting Hare Kṛṣṇa mahā-mantra. And practically we see, those who are chanting, they're becoming free from the contamination. If you follow the rules and regulations, very simple thing, and chant Hare Kṛṣṇa mahā-mantra... That is our only request. Then, in spite of this contaminated age of Kali, you'll be saved. You'll be saved. That we are... That is our... Kṛṣṇa consciousness movement means that we are preaching this cult.