Through the association of devotees, one can engage in the service of the Lord by hearing and chanting. Thus one can revive his dormant Krishna consciousness and sticking to the cultivation of Krishna consciousness, return home, back to Godhead, even in this life.
It is our duty to act in Krishna consciousness because we are constitutionally parts and parcels of the Supreme.
Path of Perfection, Chapter 1
The entire Krishna consciousness movement is based on the principles of the sankirtana movement inaugurated by Sri Chaitanya Mahaprabhu. Therefore one who tries to understand the Supreme Personality of Godhead through the medium of the sankirtana movement knows everything perfectly.
Purport on Srimad bhagavatam 7.9.38
If those who live in Bharatvarsha, rigidly follow the principles of Varnashram dharma and develop their dormant Krishna Consciousness, they need not return to this material world after death.
In its present condition, the world can only be saved by introducing this sankirtana, this Krishna consciousness movement.
Purport on Srimad Bhagavatam 4.18.8
The Krishna consciousness movement is based on this principle: chant the Hare Krishna mantra at every moment, as much as possible, both inside and outside of the temples, and as far as possible distribute prasada.