If we have a particular service to Krsna, if our meditation is to reject that service in order to accept another—because the service doesn’t please us—then that is not favorable to the cultivation of bhakti. “Favorable” means that we are doing those things that help increase our service attitude toward Krsna. As soon as we begin to calculate things according to what is favorable for ourselves, then we are no longer striving for pure bhakti.
Lectures from a disciple Vol 1, pg 320, Bhaktyaloka, Moscow, 1.12.97