bhaktih krsne daya jivesv
akuntha-jnanam atmani
yadi syad atmano bhuyad
apavargas tu samsrteh

TRANSLATION

If a living entity is developed in Krsna consciousness and is merciful to others, and if his spiritual knowledge of self-realization is perfect, he will immediately attain liberation from the bondage of material existence.

PURPORT

In this verse the words daya jivesu, meaning "mercy to other living entities," indicate that a living entity must be merciful to other living entities if he wishes to make progress in self-realization. This means he must preach this knowledge after perfecting himself and understanding his own position as an eternal servant of Krsna. Preaching this is showing real mercy to living entities. Other types of humanitarian work may be temporarily beneficial for the body, but because a living entity is spirit soul, ultimately one can show him real mercy only by revealing knowledge of his spiritual existence. As Caitanya Mahaprabhu says, jivera 'svarupa' haya-krsnera 'nitya-dasa': [Cc. Madhya 20.108] "Every living entity is constitutionally a servant of Krsna." One should know this fact perfectly and should preach it to the mass of people.

SB 4.29.1b