Srila Prabhupada :
"No question of going into a secluded place. We should remaining the congested city and preach this Krishna consciousness movement without being affected by this contamination of city life. That is perfection. They shall not be contaminated, touched by the contamination of the city life, but still, they will go on with Krsna consciousness. That is perfection."
Bhagavad-gita 3.1-5 -- December 20, 1968, Los Angeles