Prabhupāda: Nature's law is very strict. Daivī hy eṣā guṇamayī mama māyā duratyayā (BG 7.14). Once you have committed mistake, immediately nature's law reacts, and it is very difficult to come out of it. Daivī hy eṣā guṇamayī mama māyā duratyayā. But there is only one way. That is anuvarṇitena, repeatedly chanting Hare Kṛṣṇa, repeatedly. That is the only way. Harer nāmaiva kevalam. That is recommended by Caitanya Mahāprabhu. Kīrtanād eva kṛṣṇasya mukta-saṅgaḥ paraṁ vrajet (SB 12.3.51). This is the simple... Kali-yuga, this is the only way. Kaler doṣa-nidhe rājann hy asti eko mahān guṇaḥ. This is the greatest qualification of Kali-yuga. Great personalities, they very much eulogize Kali-yuga that there is simple method and so sublime: simply by chanting Hare Kṛṣṇa mantra, one becomes completely purified. Pūyeta yena hi pumān anuvarṇitena. Anu means repetition, and anu means following the footsteps of authority, spiritual master, anu. Our process is anu. We don't manufacture anything. We simply follow. Mahājano yena gataḥ sa panthāḥ (CC Madhya 17.186). Mahājanas, great personalities, great authorities, that is our process. Guru-mukha-padma-vākya, cittete kariyā aikya, āra na koriya mane āśa. This is the process. The guru-mukha-padma-vākya, whatever is coming out of the mouth of the spiritual master... Because he'll never speak nonsense. He'll also speak the same thing which he has heard from his guru. That is called anu. Anu, following. So this is very easy. We don't manufacture things. What is the use of manufacturing things? We are imperfect; what we can manufacture? Whatever we shall manufacture, that is imperfect because we are imperfect. The modern scientists, they are manufacturing some ideas. I manufacture, and you manufacture some idea. You defeat me; I defeat you. So tarkaḥ apratiṣṭhaḥ (CC Madhya 17.186). In this way—I defeat you; you defeat me—that will not solve the problem. The problem will be solved when we follow the authority. Anuvarṇitena.
(Srila Prabhupada Lecture, Mayapur, February 19, 1976)