The wise grieve neither for the living nor for the dead. There was never a time when you and I and all the kings gathered here have not existed and nor will there be a time when we will cease to exist.
He is the source of light in all luminous objects. He is beyond the darkness of matter and is unmanifested. He is knowledge, He is the object of knowledge, and He is the goal of knowledge. He is situated in everyone's heart.
You have the right to work, but never to the fruit of work. You should never engage in action for the sake of reward, nor should you long for inaction. Perform work in this world, Arjuna, as a man established within himself - without selfish attachments, and alike in success and defeat.