naivatmanah prabhur ayam nija-labha-purno
manam janad avidusah karuno vrnite
yad yaj jano bhagavate vidadhita manam
tac catmane prati-mukhasya yatha mukha-srih
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The Supreme Lord, the Supreme Personality of Godhead, is always fully satisfied in Himself. Therefore when something is offered to Him, the offering, by the Lord’s mercy, is for the benefit of the devotee, for the Lord does not need service from anyone. To give an example, if one’s face is decorated, the reflection of one’s face in a mirror is also seen to be decorated.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
In bhakti-yoga it is recommended that a devotee follow nine principles: sravanam kirtanam visnoh smaranam pada-sevanam/ arcanam vandanam dasyam sakhyam atma-nivedanam. This service of glorifying the Lord by hearing, chanting and so on is not, of course, meant for the benefit of the Lord; this devotional service is recommended for the benefit of the devotee. The Lord is always glorious, whether the devotee glorifies Him or not, but if the devotee engages in glorifying the Lord, the devotee himself automatically becomes glorious. Ceto-darpana-marjanam bhava-maha-davagni-nirvapanam. By glorifying the Lord constantly, the living entity becomes purified in the core of his heart, and thus he can understand that he does not belong to the material world but is a spirit soul whose actual activity is to advance in Krsna consciousness so that he may become free from the material clutches. Thus the blazing fire of material existence is immediately extinguished (bhava-maha-davagni-nirvapanam). A foolish person is amazed that Krsna orders, sarva-dharman parityajya mam ekam saranam vraja: “Abandon all varieties of religious activities and just surrender unto Me.” Some foolish scholars even say that this is too much to demand. But this demand is not for the benefit of the Supreme Personality of Godhead; rather, it is for the benefit of human society. If human beings individually and collectively surrender everything to the Supreme Personality of Godhead in full Krsna consciousness, all of human society will benefit. One who does not dedicate everything to the Supreme Lord is described in this verse as avidusa, a rascal. In Bhagavad-gita (7.15), the Lord Himself speaks in the same way:
na mam duskrtino mudhah
asuram bhavam asritah
“Those miscreants who are grossly foolish, lowest among mankind, whose knowledge is stolen by illusion, and who partake of the atheistic nature of demons, do not surrender unto Me.” Because of ignorance and misfortune, the atheists and the naradhamas, the lowest of men, do not surrender unto the Supreme Personality of Godhead. Therefore although the Supreme Lord, Krsna, is full in Himself, He appears in different yugas to demand the surrender of the conditioned souls so that they will benefit by becoming free from the material clutches. In conclusion, the more we engage in Krsna consciousness and render service unto the Lord, the more we benefit. Krsna does not need service from any of us.