If our purpose is to please, to serve, if our purpose is striving to become selfless in our service, the joy of Bhakti is experienced to the degree we are selfless in our efforts. To the degree we have false ego and selfish motivations in what we do; that activity cannot bring fulfillment to the heart because fulfillment comes from the reciprocation of Krishna being pleased within. That is fulfillment.
(Source: H.H. Radhanath Swami)
