Those who are conducting different centers and temples, they should be very responsible men. Because everything will depend on their sincere activities and character. If they are insincere, then that will not be effective. One may come and associate with us, but if we are insincere, then it will be not be effective. But if the devotees are sincere, anyone who will come in contact with a devotee, he'll change. That is the secret.

Srila Prabhupada; Purport to Gaura Pahu