From Dog-eater to a Vaishnava

"My dear Lord, if even a person born in a family of dog-eaters hears and repeats the chanting of Your glories, offers respects to You and remembers You, he is immediately greater than a brahmana and is therefore eligible to perform sacrifices. Therefore, what is to be said of one who has seen You directly?"

In the Padma Purana there is a statement that persons whose hearts are always attached to the devotional service of Lord Vishnu are immediately released from all the reactions of sinful life. These reactions generally exist in four phases. Some of them are ready to produce results immediately, some are in the form of seeds, some are unmanifested, and some are current. All such reactions are immediately nullified by devotional service. When devotional service is present in one's heart, desires to perform sinful activities have no place there. Sinful life is due to ignorance, which means forgetfulness of one's constitutional position as an eternal servant of God, but when one is fully Krishna conscious he realizes that he is God's eternal servant.

Shrimad-Bhagavatam 6.1.15
(Purport by His Divine Grace A.C.Bhaktivedanta Swami Prabhupada
Founder-Acharya of International Society for Krishna Consciousness)