Pancha Mahabhutas - In Gita Verse 2.17 That which pervades the entire body you should know to be indestructible. No one is able to destroy that imperishable soul.
Here Krishna says the way in which universe is indestructible our body is indestructible, as it is made from same stuff. Our scripture says that our body is made up of five elements.
According to Ayurveda everything in the universe is made up of these five great elements: Pancha Mahabhutas; space, air, fire, water and earth. Each of these elements offers unique qualities to our experience of living. And together, they are the basis for our connection with universe.
1. Space: The container for everything. It is pure possibility and potential.
2. Air: Movement, expansion and lightness. The breath in and out of the body, the opening and contraction of the muscles and the mind.
3. Fire: Discipline, transformation, inspiration.
4. Water: Fluidity, connection, adaptability.
5. Earth: Earth is home.
All these elements are indestructive. Means they can change the form but it cannot be destroyed. In my blog Bhagavad Gita Verse 2.12, I wrote what even Einstein told - “Energy cannot be created or destroyed, it can only be changed from one form to another.”
It’s not a myth but rather a scientifically proven fact that our bodies and minds change every 7 years. All of us are changing every moment, our cells are changing. According to Rudolf Steiner and other scientists, seven-year cycles are extremely important to doctors, teachers, social scientists, and psychiatrists. This is because of how your mind and body changes every 7 years.
What Krishna is saying is the same thing that whole universe is made up of same stuff, matter changes its form but the soul or which holds all this elements is imperishable. In presence of soul every change is happening.
In front of us many things change:
1. Look at the caterpillars, caterpillars are short, stubby and have no wings at all. Within the chrysalis the old body parts of the caterpillar are undergoing a remarkable transformation, called 'metamorphosis,' to become the beautiful parts that make up the butterfly that will emerge.
2. Look at the candle, one flame disappears and another comes, Buddha calls it continuum - a continuous sequence in which adjacent elements are not perceptibly different from each other, but the extremes are quite distinct. Means one disappears and other comes. In utter silence.
If you will become watcher then immediately you will be able to see the unseen, means without logical mind if you watch anything you will see that when caterpillar changes to butterfly, one flame to another flame, slowly slowly it will become your realization that something is changing on the surface which is at the centre is non-changing.
Try to understand what Krishna is saying in this way: Watch your misery very closely, a distance will be created between you and the misery. In fact, whenever you look at a thing, immediately a distance is created between you and the thing itself. Seeing causes the distance. No matter what we look at, a distance immediately begins to take place.
If you look closely at your misery, you will find a separation between the misery and you, because only that which is separate from you can be seen. Obviously, that which is inseparable one of you cannot be seen. One who is aware of his misery, one who is filled with consciousness, one who is full of remembrance, experiences the misery as somewhere else, and he is somewhere at a distance.
The day a man comes to realize the difference between himself and the misery, as soon as he comes to know his pain is happening somewhere at a distance, the unconsciousness caused by misery ceases to exist. And once a person comes to understand that the sufferings as well as the happinesses of the body occur elsewhere, that one is merely a knower of them, his identity with the body is severed. Then he knows he is not the body.
Krishna tells Arjuna to watch the misery and immediately you will be connected to your subjectivity, your soul. Then you will understand that your assignment of the universe Fighting Without Enmity, which your logical mind will not understand. It will give you misery. So be watcher of your misery. Krishna is not saying that come to your consciousness and remember your assignment of universe. Krishna is just directing him to be watcher.