From the instructions of Lord Caitanya to Sanātana Gosvāmī we can understand the science of God as it relates to God's transcendental form, His opulences, and His devotional service. Indeed, everything is being explained to Sanātana Gosvāmī by the Lord Himself. At that time, Sanātana fell at the feet of the Lord and with great humility asked about his own real identity. "I am born of a lower family," Sanātana said. "My associations are all abominable, and I am fallen, the most wretched of mankind. I was suffering in the dark well of material enjoyment, and I never knew the actual goal of my life. Indeed, I do not even know what is beneficial for me. Although I am what is known in the world as a great learned man, I am in fact so much of a fool that I myself even think that I am learned. You have accepted me as Your servant, and You have delivered me from the entanglement of material life. Now please tell me what my duty is in this liberated state."
By this plea, we can understand that liberation is not the final word in perfection. There must be activities in liberation. Sanātana clearly says, "You have saved me from the material existence. Now, after liberation, what is my duty?" Sanātana further inquired, "Who am I? Why are the threefold miseries always giving me trouble? And finally, tell me how I can be relieved from this material entanglement? I do not know how to question You about the advancement of spiritual life, but I beg that You kindly, mercifully, let me know everything that I need know."
This is the process of accepting a spiritual master. One should approach a spiritual master, humbly submit to him and then inquire from him about one's spiritual progress.