Bhagavad Gita is a text which tells us how to attain enlightenment, says Atma Marshini. The most worthwhile endeavor in our life is to find out who or what we are, he adds. In these 18 chapters, 700 verses divided into 18 chapters, one way of reading it is to see it as divided into three sections each from chapter one to six, seven to 12 and 13 to 18. Most famously Ramana Maharshi would teach: "Who am I? Find out who you are"