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 Mahaprabhus 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 Lords instructions all over the world for the peace and prosperity of humanity.