The key lies in the awareness that service to others is always service to the Divine.
Within every individual, lies the spark of the Divine. As a result, the Master is completely saturated with the love of service to the Other as a mechanism for service to the Self which inextricably rests in the heart of the Divine All.
This is the nature of being in alignment with Self. When we restrict ourselves from this which is our true nature, that we are in fact, ONE, we feel seperated from Home, and the gap must be filled by something. Often it is filled with suffering or pain, Yet, when we flow, opening into the love of service to the Divine, melding it within our every action, thought or relationship, we feel a form of contentment that is actually more like bliss.