The Krsna consciousness movement is not very popular with the karmis because this movement recommends that one refrain from illicit sex, meat-eating, gambling and intoxication. These are restrictions that karmis very much dislike. Nonetheless, in the presence of so many enemies, this movement is progressing, going forward without impediments. If the devotees continue to spread this movement, dedicating life and soul to the lotus feet of Krsna, no one will be able to check it. The movement will go forward without limits. Chant Hare Krsna!

From Srila Prabhupada’s purport to SB 8.5.47