The members of the International Society for Krishna Consciousness cannot even call themselves brahma-bandhus. Therefore our only means for satisfying Krsna is to pursue the injunctions of Lord Sri Caitanya Mahaprabhu, who says:
yare dekha, tare kaha 'krsna'-upadesa
amara ajnaya guru hana tara' ei desa"Whomever you meet, instruct him on the teachings of Krsna. In this way, on My order, become a spiritual master and deliver the people of this country." (Cc. Madhya 7.128) Simply trying to follow the orders of Sri Caitanya Mahaprabhu, we speak to the people of the world about Bhagavad-gita As It Is. This will make us qualified to satisfy the Supreme Personality of Godhead, Krsna.
(Sri Chaintanya Caritamrita Adi 17.78)
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 maha-mantra: Hare Krsna, Hare Krsna, Krsna Krsna, Hare Hare Hare Rama, Hare Rama, Rama Rama, Hare Hare. If one is a little literate and can read the Bhagavad-gita As It Is and Srimad-Bhagavatam, 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 Krsna maha-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 Krsna-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 Krsna consciousness movement is trying to elevate human society to the perfection of life by pursuing the method described by Sri Caitanya Mahaprabhu in His advice to the brahmana Kurma. That is, one should stay at home, chant the Hare Krsna mantra and preach the instructions of Krsna as they are given in the Bhagavad-gita and Srimad-Bhagavatam.
(Sri Chaintanya Caritamrita Madhya 7.128)
However expert one may be, he can never describe the glories of the Lord adequately. Nonetheless, those engaged in glorifying the activities of the Lord should try to do so as far as possible. Such an attempt will please the Supreme Personality of Godhead. Lord Caitanya has advised all His followers to go everywhere and preach the message of Lord Krsna. Since this message is essentially Bhagavad-gita, the preacher's duty is to study Bhagavad-gita as it is understood by disciplic succession and explained by great sages and learned devotees. One should speak to the general populace in accordance with one's predecessors -- sadhu, guru and sastras. This simple process is the easiest method by which one can glorify the Lord. Devotional service, however, is the real method, for by devotional service one can satisfy the Supreme Personality of Godhead with just a few words. Without devotional service, volumes of books cannot satisfy the Lord. Even though preachers of the Krsna consciousness movement may be unable to describe the glories of the Lord, they can nonetheless go everywhere and request people to chant Hare Krsna.
(Srimad Bhagvatam 4.16.3)
One wanders within the universe, life after life, but by the grace of a devotee, a servant of Sri Caitanya Mahaprabhu, one can get the clue to Krsna consciousness and then not only become happy in this world but also return home, back to Godhead. That is the real target in life. The members of the Krsna consciousness movement are not at all interested in so-called meditation in the Himalayas or the forest, where one will only make a show of meditation, nor are they interested in opening many schools for yoga and meditation in the cities. Rather, every member of the Krsna consciousness movement is interested in going door to door to try to convince people about the teachings of Bhagavad-gita As It Is, the teachings of Lord Caitanya. That is the purpose of the Hare Krsna movement. The members of the Krsna consciousness movement must be fully convinced that without Krsna one cannot be happy. Thus the Krsna conscious person avoids all kinds of pseudo spiritualists, transcendentalists, meditators, monists, philosophers and philanthropists.
(Srimad Bhagvatam 7.9.44)
"I instructed this imperishable science of yoga to the sun-god, Vivasvan, and Vivasvan instructed it to Manu, the father of mankind, and Manu in turn instructed it to Iksvaku." This is the process of disciplic succession. Following the same process, the Krsna consciousness movement is teaching the principles of Bhagavad-gita as it is, without deviation, all over the world. If the fortunate people of this time accept the instructions of Lord Krsna, they will certainly be happy in Sri Caitanya Mahaprabhu's mission. Caitanya Mahaprabhu wanted everyone, at least in India, to become a preacher of this mission. In other words, one should become a guru and preach the Lord's instructions all over the world for the peace and prosperity of humanity.
(Srimad Bhagvatam 8.14.5)