The soul is indestructible, eternal and without measure, only the material bodies which it borrows are subject to destruction. The material body is, by nature, perishable. Whether in a moment or in a hundred years, he will die; it's just a matter of time; it is impossible to keep him alive indefinitely. But the soul, so thin, how could an enemy destroy it, if it cannot even see it?
The soul is so small that you can't even measure it. Seen from one angle or another, the loss of the body is not worthy of tears, lamentations or afflictions, since one cannot kill the being itself, that is to say the 'soul. As for the body, it is anyway impossible to protect it and keep it indefinitely. And it is essential for man to observe religious principles during his earthly life, because the material body in which he will be reincarnated will be the fruit of the acts accomplished in this life.
The original sacred scriptures call “light” the living being, the soul, a piece of the supreme light, God. The “light” of the soul keeps the material body alive. As soon as the soul leaves it, the body decomposes; he cannot live without it. The body in itself therefore matters little.
Ignoring one who believes that the soul can kill or be killed; the wise man knows that she neither kills nor dies. Understand that the spiritual being is not destroyed when deadly weapons strike the body. The soul is so small that no material weapon can reach it. Of a spiritual nature, it cannot die. Only the body dies, or at least is said to die. But beware, such knowledge should in no way encourage murder. God, through the original scriptures enjoins us to never use violence against anyone. Knowing that the real being never dies does not allow the slaughter of animals either. Destroying the body of any being is an abominable act, punishable by human law as well as that of God.
Krishna, God said, “The soul knows neither birth nor death. Alive, it will never cease to be. Unborn, immortal, original, eternal, it never had a beginning, and never had an end. It does not die with the body”.
As a quality, the infinitesimal soul is one with the Supreme Soul, of which it is a tiny part. It does not undergo changes like the body, and that is why it is also called “unchanging”. The body goes through six stages during its existence: it appears in a mother's womb, remains there for some time, then is born, grows, produces descendants, finally weakens and dies, only to disappear into oblivion. But one cannot say of the soul that it is born and undergoes these transformations; on the contrary, it is because it must take on a carnal envelope that the body is born. It is therefore not created at the moment when the body is formed, any more than it dies