kṛte yad dhyāyato viṣṇuḿ
tretāyāḿ yajato makhaiḥ
dvāpare paricaryāyāḿ
kalau tad dhari-kīrtanāt
krite -- in the Satya-yuga; yat -- which; dhyayatah -- from meditation; vishnum -- on Lord Vishnu; tretayam -- in the Treta-yuga; yajatah -- from worshiping; makhaih -- by performing sacrifices; dvapare -- in the age of Dvapara; paricaryayam -- by worshiping the lotus feet of Krishna; kalau -- in the age of Kali; tat -- that same result (can be achieved); hari-kirtanat -- simply by chanting the Hare Krishna maha-mantra.
Whatever result was obtained in Satya-yuga by meditating on Vishnu, in Treta-yuga by performing sacrifices, and in Dvapara-yuga by serving the Lord's lotus feet can be obtained in Kali-yuga simply by chanting the Hare Krishna maha-mantra.
A similar verse is found in the Vishnu Purana (6.2.17), and also in the Padma Purana (Uttara-khanda 72.25) and the Brihan-naradiya Purana (38.97):
dhyayan krite yajan yajnais
tretayam dvapare 'rcayan
yad apnoti tad apnoti
kalau sankirtya kesavam
"Whatever is achieved by meditation in Satya-yuga, by the performance of sacrifice in Treta-yuga, and by the worship of Lord Krishna's lotus feet in Dvapara-yuga is obtained in the age of Kali simply by glorifying the name of Lord Kesava."
Srila Jiva Gosvami has further quoted from the Brahma-vaivarta Purana concerning the degraded condition of people in Kali-yuga:
atah kalau tapo-yoga-
vidya-yajnadikah kriyah
sanga bhavanti na kritah
kusalair api dehibhih
"Thus in the age of Kali the practices of austerity, yoga meditation, Deity worship, sacrifice and so on, along with their various subsidiary functions, are not properly carried out, even by the most expert embodied souls.
Srila Jiva Gosvami has also cited the Caturmasya-mahatmya of the Skanda Purana concerning the necessity of chanting Hare Krishna in this age:
tatha caivottamam loke
tapah sri-hari-kirtanam
kalau yuge viseshena
vishnu-prityai samacaret
"In this way the most perfect penance to be executed in this world is the chanting of the name of Lord Sri Hari. Especially in the age of Kali, one can satisfy the Supreme Lord Vishnu by performing sankirtana.''
In conclusion, massive propaganda should be made all over the world to induce people to chant the Hare Krishna mantra, by which human society can be rescued from the dangerous ocean of the age of Kali.
Thus end the purports of the humble servants of His Divine Grace A. C. Bhaktivedanta Swami Prabhupada to the Twelfth Canto, Third Chapter, of the Srimad-Bhagavatam, entitled "The Bhumi-gita."
