The Krsna consciousness movement is based upon this instruction of Lord Caitanya Mahaprabhu that one must chant the Hare Krsna maha-mantra regularly and according to the prescribed principles. We simply ask our Western students to chant at least sixteen rounds a day, but sometimes we find that they fail to chant even these sixteen rounds, and instead they bring many austere books and a worshiping method that diverts their attention in so many ways. Sri Caitanya Mahaprabhu’s cult is based upon the chanting of the Hare Krsna mantra. Lord Caitanya first advised Tapana Misra to fix his mind on this chanting. We, the members of the Krsna consciousness movement, must strictly follow this advice of Caitanya Mahaprabhu.
Srila Prabhupada — CC Adi 16.15 purport