This acts upon the living entity who surrenders completely to the Lord and accepts his position as an eternal servant. By placing oneself at the disposal of the Supreme Lord, by being ready to do His will, He is then gradually revealed to us by spiritual energy. Without this assistance of spiritual energy, it is impossible to glorify the Lord through prayers. When the individual being distinct from God is truly revived by spiritual energy, all his senses become purified, and he devotes himself exclusively to the service of the Lord. At this stage, his hands, legs, ears, tongue, mind, genitals, in short, his entire body, actively participate in the service he offers to the Lord. Thus enlightened, the holy being no longer has any material activities, nor does he have the slightest desire to engage in such activities.

This path by which the living entity purifies his senses and uses them in the service of the Lord is none other than devotional service. Initially, the activities of his senses will be regulated by the spiritual master and the holy scriptures, and when he has reached the level of spiritual realization, when these same senses are purified, he will continue to act on this same path. In other words, in the beginning, the senses are used mechanically in the service of the Lord, but after the stage of spiritual realization, they are used with full knowledge.

Lord Krishna teaches that, from within, He gives to those who continually strive to serve Him with love and devotion the intelligence that enables them to progress in the path of devotional service. Thus encouraged, the holy being can never forget the Divine Personality, not even for a single moment. He always feels indebted to Him for having attained, through His grace, increased power in devotional service. Through this knowledge of the Lord, saintly beings like Sanaka, Sanatana, and Brahma were able to see the entire galaxy by His mercy. Even though a man appears to remain awake all day, until he develops spiritual vision within himself, he is in reality only sleeping. Whether he sleeps at night and performs his duties during the day does not alter the fact. Until he comes to act in full spiritual light, he is considered to be continually asleep. Therefore, a saint never forgets all that he owes to the Lord. The Lord is called “the friend of the unfortunate.” After spending countless lives in harsh austerities for knowledge, a man attains true knowledge and attains real wisdom when he surrenders to the Supreme Personality of Godhead. Thus, a saintly being who has attained perfect knowledge can never forget what he owes to the Lord.