Question: What qualifies one for devotional service and what are the practical means by which perfection in devotion may be achieved?
Answer by Romapada Swami: Nectar of Devotion describes that even if one is not in a perfectly purified condition, contact with a pure devotee, and an unflinching attraction for Krishna are preliminary qualifications that make one eligible for devotional service.
Thereafter, by engaging in the nine processes of devotional service, beginning with hearing and chanting about Krishna under the guidance of a bona fide spiritual master, in the association of devotees, one can gradually achieve the highest perfection in devotion.