CC Madhya 7.128

yāre dekha, tāre kaha ‘kṛṣṇa’-upadeśa
āmāra ājñāya guru hañā tāra’ ei deśa
Word for word: 
yāre — whomever; dekha — you meet; tāre — him; kaha — tell; kṛṣṇa-upadeśa — the instruction of the Bhagavad-gītā as it is spoken by the Lord or of Śrīmad-Bhāgavatam, which advises one to worship Śrī Kṛṣṇa; āmāra ājñāya — under My order; guru hañā — becoming a spiritual master; tāra’ — deliver; ei deśa — this country.
Translation: 
“Instruct everyone to follow the orders of Lord Śrī Kṛṣṇa as they are given in the Bhagavad-gītā and Śrīmad-Bhāgavatam. In this way become a spiritual master and try to liberate everyone in this land.”
Purport: 

This is the sublime mission of the International Society for Krishna Consciousness. Many people come and inquire whether they have to give up family life to join the Society, but that is not our mission. One can remain comfortably in his residence. We simply request everyone to chant the mahā-mantra: Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare. If one is a little literate and can read Bhagavad-gītā As It Is and Śrīmad-Bhāgavatam, that is so much the better. These works are now available in an English translation and are done very authoritatively to appeal to all classes of men. Instead of living engrossed in material activities, people throughout the world should take advantage of this movement and chant the Hare Kṛṣṇa mahā-mantra at home with their families. One should also refrain from sinful activities — illicit sex, meat-eating, gambling and intoxication. Out of these four items, illicit sex is very sinful. Every person must get married. Every woman especially must get married. If the women outnumber the men, some men can accept more than one wife. In that way there will be no prostitution in society. If men can marry more than one wife, illicit sex life will be stopped. One can also produce many nice preparations to offer Kṛṣṇa — grain, fruit, flowers and milk. Why should one indulge in unnecessary meat-eating and maintain horrible slaughterhouses? What is the use of smoking and drinking tea and coffee? People are already intoxicated by material enjoyment, and if they indulge in further intoxication, what chance is there for self-realization? Similarly, one should not partake in gambling and unnecessarily agitate the mind. The real purpose of human life is to attain the spiritual platform and return to Godhead. That is the summum bonum of spiritual realization. The Kṛṣṇa consciousness movement is trying to elevate human society to the perfection of life by pursuing the method described by Śrī Caitanya Mahāprabhu in His advice to the brāhmaṇa Kūrma. That is, one should stay at home, chant the Hare Kṛṣṇa mantra and preach the instructions of Kṛṣṇa as they are given in the Bhagavad-gītā and Śrīmad-Bhāgavatam.