Srila Prabhupada on March 4, 1974 in Mayapur:
"There is no limit of kirtana. That is unlimited. So Caitanya Mahaprabhu's instruction is that "Glorify the Lord continuously." Trnad api sunicena. And as soon as you begin kirtaniyah, real kirtana of Krsna, then you'll have many enemies. Caitanya Mahaprabhu personally had many enemies. You know that in this spot there was persecution, religious persecution, by the then magistrate, Chand Kazi. His samadhi is still there. And we are also experiencing. Our only fault is that we are preaching the sankirtana movement, and there are so many enemies. You see? So that is possible. Even the father becomes enemy. Prahlada Maharaja, a five-years-old boy, and because he was chanting Hare Krsna mantra, his father became enemy. So you'll have enemies."
(After all, the last leg of Dharma is truthfulness, and Kali was beating Dharma's last leg. Thus, in this age, when Absolute Truth, (even relative truth) is presented to people, such presentation can create enemies.)
Comments
"In this age, Kali-yuga, to kill the demons means to stop their demonic activities by the weapon of kirtana, hari-sankirtana, which is spread by Lord Chaitanya's associates."
The material attempt changes from one position to another, and no one actually gains relief from the struggle for existence. The only resort is the Lotus Feet of a bona fide spiritual master, and, through Him, the Lotus Feet of the Lord