Beginning of Devotional Service
Devotional service begins with the chanting of the Hare Krishna mantra and side by side trying to understand Krishna in truth.
Bhagavad Gita 9.20,
Srila Prabhupada.
Devotional Service
Devotional service is not a job, it is a privilege.
Lord Caitanya’s Unique Contribution
Pure devotional service is the satisfying activity for the soul. So Lord Caitanya was specifically preaching pure devotional service, this was his unique contribution. Even in the history of whole vedic culture it was very rare to find someone who is preaching pure devotional service, other than Narada-muni and some acharyas. Lord Caitanya was very strict he wanted his followers to maintain that integrity of preaching only pure devotional service. When some of his followers visit other people who are not preaching pure devotional service, he would abandon them.
Real Result of Devotional Service
The real result of devotional service is the awakening of pure love for the Supreme Personality of Godhead, which continues under all circumstances.
Srimad Bhagavatam 5.24.19,
Srila Prabhupada
Sincere Devotional Service
If one renders even a small amount of sincere devotional Service, Krishna becomes obliged to elevate such person and what to speak of one whose entire life and soul has been dedicated to Krishna's service. — Letter to Harer Nama, 06th Nov, 1969.
Crying of Children
The child cries to have toys, but one who can cry for the Lord in love is certainly successful in the line of devotional service.