Prabhupada compared the practitioner to an unripe mango. Ultimately, the activities of the sadhaka and the siddha are the same, but one practice is unripe and the other ripe. We assume that what is unripe will ripen over time. That will surely happen if we fix Krsna as our goal.
Lectures from a disciple Vol 1, pg 323, Bhaktyaloka, Moscow, 1.12.97