The essence of Bhagavad Gita is Bhakti Yoga. Bhakti refers to devotion to the Supreme Lord. Krishna declares Himself the Supreme Lord and Absolute Truth throughout the Bhagavad Gita advising the yogi to meditate upon Himself with love. The text culminates in the instruction to surrender to Krishna in full devotion making him the object of all meditation and worship. This is an esoteric secret requiring the personal qualification of devotion, austerity and non-enviousness. One must hear Bhagavad Gita from a proper source to enter into this great mystery.