The impermanent has no reality; reality lies in the eternal. Those who have seen the boundary between these two have attained the end of all knowledge. Realize that which pervades the universe and is indestructible; no power can affect this unchanging, and perishable reality. The body is mortal, but that which dwells in the body is immortal and immeasurable. Therefore Arjuna, fight in this battle.
One believes he is the slayer, another believes he is the slain. Both are ignorant; there is neither slayer nor slain. You were never born; you will never die. You have never changed; you can never change. Unborn, eternal, immutable, immemorial, you do not die when the body dies. Realizing that which is indestructible, eternal, unborn, and unchanging, how can you slay or cause another to slay?
As one abandons worn-out clothes and acquires new ones, so when the body is worn out a new one is acquired by the Self, who lives within.
The Self cannot be pierced by weapons or burned by fire; water cannot wet it, nor can the wind dry it. The South cannot be pierced or burned, made wet or dry. It is everlasting and infinite, standing on the motionless foundations of eternity the self is unmanifested, John doll thought, beyond all change. Knowing this, you should not grieve.
O mighty Arjuna, even if you believe the Self to be subject to birth and death, you should not grieve. Death is inevitable for the living; birth is inevitable for the dead. Since these are unavoidable, you should not sorrow. Every creature is on manifested at first and then attains manifestation. When it’s and has come, it once again becomes on manifested. What is there to lament in this?
The glory of the self is be held by a few, and if you describe it; a few listen, but many without understanding. The self of all beings, living within the body, is eternal and cannot be harmed therefore do not grieve.
From The Bhagavad Gita