The Bhagavad Gita is for the seekers of the truth.
It is for those who wish to reach a state of happiness which is beyond what can be achieved from the fulfilment of the transient desires of life which money, name and fame can give
When a dry   leaf is  blown by the wind and   placed on the   top of a roof , the  leaf has nothing to  be proud of.

 It was the unseen hands of the wind that did it. 

The Bhagavad Gita helps  the leaf 

 to shed off its ego and its belief that it was its own intelligence and capacity  that had taken  it to   the   roof  top;

and also helps it to know the truth  that  it had no  choice, but  be  carried by the wind.

 Some people believe that

the “Bhagavad Gita” is

  Krishna  “coaxing a reluctant Prince Arjuna to fight the battle at Kurukshetra
thus teaching  man the art of doing his Karma or duty

To the casual reader the contents of the Gita would indeed say so.

For eg:

“Therefore Arjuna! Get up!  Fight! Be victorious, gain all glory and rule the kingdom.. . . .”

(Bhagavad Gita Chapter 11:33)

In his Gita Bhashya, the most relied upon explanation of the Bhagavad Gita,

Bhagavad-paadar Sri Adi Shankara has stated  (2:1-11):

The  Gita, “is intended for the welfare of the whole world (sarva –loka-anugrahaartha).

Making Prince Arjuna an intermediary, (arjunam nimithee-krithya) Bhagavaan has explained to the world  as to how to get across this  life  filled with  desires and sorrows (shoka-mohou) ”

As one goes deeper into the Bhagavad Gita ,

one would realize the Bhagavad Gita as a book giving insight into how one fights an inner battle,

rather than a battle on a battle field .
It teaches how one can  surrender one's ego

One of the most celebrated quotes from  the Bhagavad Gita is that of

Robert Oppenheimer, the father of the atom bomb .
While visiting Japan in 1960 in response to questions about the test explosion of the atomic bomb at New Mexico on July 16, 1945, he had said :

“We knew the world would not be the same. A few people laughed, a few people cried, most people were silent.

I remembered the line from the Hindu scripture, the Bhagavad Gita …………

‘Now I am become Death, the destroyer of worlds.’

I suppose we all thought that, one way or another”

[“Kaalo –asmi loka-kshaya-krith pravrudho

Lokaan-samaaharthum-iha pravruthaha”

(I am the destroyer of the worlds. I engage in destroying the worlds ) (Chapter 11:32)

General Farrell, who probably had not read the Bhagavad Gita,
later wrote about the event of the day:

"The lighting effects beggared description. The whole country was lighted by a searing light with the intensity many times that of the mid-day sun. It was golden, purple, violet, gray, and blue. It lighted every peak, crevasse and ridge of the nearby mountain range with a clarity and beauty that cannot be described but must be seen to be imagined "

Someone familiar with the Gita,would be reminded of the description :

"Divi   Soorya-saharasya Bhavaeth-yugapath-udit'thaa

Yadi   Bhaah   Sadr'shi    Saa   Syaad-bhasa-s-tasya    Maha-aatmanaha"

“It is as if the skies are lighted by a thousand suns at the same time” (Chapter 11:12)

Robert Oppenheimer had learnt Sanskrit in 1933 and read the Bhagavad Gita  in the original, citing it later as one of the most influential books to shape his philosophy of life.

   One can refer to The "Gita" of J. Robert Oppenheimer

Oppenheimer is  being mentioned  here only to impress the reader  how someone  across the seas was  inspired to learn, a totally foreign language Sanskrit only to read the Gita. However the reader is requested not to get  side tracked by Oppenheimer / nuclear weapons .

It is the Gita that is intended to be dwelt upon

However to understand this, one has to really take up the Gita in a serious manner and go into its depth..