A devotee of Krsna is friendly to everyone. Therefore it is said here that he has no enemy (nirvairah). How is this? A devotee situated in Krsna consciousness knows that only devotional service to Krsna can relieve a person from all the problems of life. He has personal experience of this, and therefore he wants to introduce this system, Krsna consciousness, into human society. There are many examples in history of devotees of the Lord who risked their lives for the spreading of God consciousness. The favorite example is Lord Jesus Christ. He was crucified by the nondevotees, but he sacrificed his life for spreading God consciousness. Of course, it would be superficial to understand that he was killed. Similarly, in India also there are many examples, such as Thakura Haridasa and Prahlada Maharaja. Why such risk? Because they wanted to spread Krsna consciousness, and it is difficult. A Krsna conscious person knows that if a man is suffering it is due to his forgetfulness of his eternal relationship with Krsna. Therefore, the highest benefit one can render to human society is relieving one's neighbor from all material problems. In such a way, a pure devotee is engaged in the service of the Lord. Now, we can imagine how merciful Krsna is to those engaged in His service, risking everything for Him. Therefore it is certain that such persons must reach the supreme planet after leaving the body.
-Srila Prabhupada, Bhagavad-gita (11.55)