How the association of a pure devotee can benefit the whole world

It is a fact that if one takes shelter of a pure devotee, one attains all perfection, even if the association is a short one… It has been our practical experience that the first instruction of our spiritual master infused us with Krsna consciousness so that now we are at least on the path of Krsna consciousness and can understand the philosophy. As a result, there are many devotees engaged in this Krsna consciousness movement. The whole world is revolving under the bodily conception; therefore there must be devotees all over the world to deliver people from the false bodily conception and fully engage them in Krsna consciousness.

Srimad Bhagavatam 5.13.25 purport