The Bhagavad-Gita is a book on self-discovery and journey into the Abode of God. It helps one move from sorrow driven mortal existence to eternal and blissful life. Desire is a central to all human activity. By eliminating the desires, but by not abandoning the actions, one can free oneself from the bondage caused by the desire driven actions. Such an approach not only liberates us from all struggling and striving, but also reduces greatly our inner anxieties and frustrations, creating in the process a permanent basis for a stable, intelligent and peaceful life. According to the Bhagavad-Gita in the external world is unreal not because it does not exist, but because it is unstable and ever changing. Since it is based upon impermanence, it cannot be relied upon as the vehicle of truth and it should not become the purpose of ones existence. He who clings to such an unstable phenomenon is bound to suffer as he is bound to engage himself in desperate actions to retain his unstable possessions and experience constant anxiety, anger, fear, and envy. Therefore, the Bhagavad-Gita searches for a permanent reality that makes life more meaningful, stable, peaceful and purposeful. It discards layer after layer of untruth that surrounds us and reveals the shining self that exists in all of us as the centre of truth and permanence that we should all ultimately discover. It is by understanding the hidden self in us we will ultimately discover the supreme self, that exists in all of us and in whom we all exist. The scripture fundamentally deals with three primary teachings, which are called the three secrets. The first secret is about duty. One must do one duty in Accordance with ones nature. The second is about the hidden self. In every one there is a real and hidden self which is different from the external false self. Everyone must realize this difference between the outer self and the inner self. The third secret is about the omnipresence of God. One must live in this world with the awareness that all that exists in this world is but Vasudeva. These three secrets are known as guhya (secret), guhyatara (more sectet) and guhyatma (most secret). The second third fourth fifth and eighteenth Chapters deal with the first secret. The second, sixth, thirteenth to eighteenth chapters deal with the second secret. The third, seventh, eight, ninth, tenth to eighteenth chapters deal with the third secret. Each verse and every chapter in it is loaded with multiple meanings, enabling each to understand it and interpret it in his own way. When we feel that we have understood it all can safely to elsewhere for inspiration, a particular verse or a chapter again starts bothering us with its new wisdom or a perplexing insight. That is why today we have so many interpretations of the Bhagavad-Gita form various scholars.
Each verse is considered to be a very sacred mantra. The seed mantra of this scripture is said to be the 11th verse in chapter 11. The Shakti mantra of this scripture, because of which it is endowed with the divine blessings and able to exert influence on the humankind for centuries, is said to be the 66th verse in chapter 18.