Our qualification for advancement in sadhana-bhakti depends on the strength of our taste or attraction to Krishna. The more pronounced our taste, the greater our qualification. If we want to develop taste, then we must show Krishna that we want it. It is not improper to want a taste for spiritual life. But our service cannot become conditional upon whether or not we receive it. The whole purpose of service is to awaken taste.
LFD Vol 2 Pg 31, Paragraph 4