The Bhagavad Geeta expounded by Lord Krishna Himself is a beautiful treatise of the Upanishads. To explain what the Bhagavad Geeta tells us concisely:
The first word of the Bhagavad Geeta (1st Chapter, 1st Sloka) is : “Dharma” .
The last word in the Geeta (18th Chapter, last sloka) is : “Mama” — which means mine.
Between these 2 words we have the entire 700 verses of the Bhagavad Geeta — the Art of Man Making. Joining these two words we have : MAMA DHARMA. (My Dharma). Dharma in its broadest perspective means: “Law of Being” — cultivating the immortal moral and ethical values in ourselves, and performing our duties and responsibilities, in all places, at all times and under all conditions, appropriate to the stage and station of life we are in, which includes not only our welfare and well-being, but also the welfare of the society we are living in. Hence the entire Geeta is essentially talking to each one of us about our personal “Dharma“.
Bhagavad Geeta – Chapter 12 (Learn Chanting) : https://youtu.be/Mk0JJj9cGhg