Tell Hari-katha as a medicine to cure their disease.
Sripada Bhaktivedanta Vaishnava Maharaja : Swami Maharaja met with Dr. Radhakrishnan in Rashtrapati Bhavan, and requested him to give a letter of recommendation to enable him to get a visa. Dr. Radhakrishnan skeptically questioned Swami Maharaja, "What will be the result of preaching in the foreign country?" and he did not give the letter Swami Maharaja needed.
At that time, Dr. Radhakrishnan discussed Vaishnava religion with Swami Maharaja. "You are the President of this India," Swami Maharaja said to him, "but what are you doing for its benefit? There are so many dacoits and others here but you are not punishing them. What is the essence of your mood? You should be like Narada Rishi with Valmiki. Valmiki was a hunter but took the rama-nama. Mahaprabhu even saved Jagai and Madhai. What are you doing about this? My advice is that you should hear the Srimad-Bhagavatam and then tell hari-katha to the public as a medicine to cure their disease."
After that, they made an experiment. Dr. Radhakrishnan arranged for Swami Maharaja to give Bhagavatam pravacana in the local jail for a week, or perhaps a month. Afterwards, Dr. Radhakrishnan was so pleased, he arranged for him to get the visa for going abroad.
Reference:Our Srila Prabhupada a Friend to All - Mulaprakriti Dasi