The following experience was obtained from the blog http://debu7370.blogspot.com/2010/06/shri-shirdi-sai-speaks-25th-june.html.
Introduction
Jai: Grandma, I have a hard time understanding the teachings of the Bhagavad-Gita. Would you help me?
Grandma: Of course, Jai, I will be glad to. You should know that this holy book teaches us how to live happily in the world. It is an ancient holy book of Hindu Dharma (also known as Sanātana Dharma or Hinduism), but it can be understood and followed by people of any faith. The Gita has eighteen (18) chapters and a total of only 700 verses. Anyone can be helped by daily practice of only a few of its teachings.The word ‘Bhagavad’ means God or The Supreme Lord, Bhagavān in Sanskrit. ‘Gita’ means song. Thus The Bhagavad-Gita means the Song of God or the Sacred Song, because it was sung by Bhagavān Shri Krishna himself.
Here is the introduction to the Gita:
In ancient times there was a king who had two sons, Dhritarāshtra and Pāndu. The former was born blind; therefore, Pāndu inherited the kingdom. Pāndu had five sons. They were called the Pāndavas. Dhritarāshtra had one hundred sons. They were called the Kauravas. Duryodhana was the eldest of the Kauravas.
After the death of king Pāndu, his eldest son, Yudhisthira, became the lawful King. Duryodhana was very jealous. He also wanted the kingdom. The kingdom was divided into two halves between the Pāndavas and the Kauravas. Duryodhana was not satisfied with his share. He wanted the entire kingdom for himself. He tried several evil plots to kill the Pāndavas and take away their kingdom. Somehow he took over the entire kingdom of the Pāndavas and refused to give it back without a war. All peace talks by Lord Krishna and others failed, so the big war of Mahābhārata could not be avoided.

