Sadhguru:
When we say “Shiva,” there are two fundamental aspects that we are referring to. The word “Shiva” means literally, “that which is not.” Today, modern science is proving to us that everything comes from nothing and goes back to nothing. The basis of existence and the fundamental quality of the cosmos is vast nothingness. The galaxies are just a small happening – a sprinkling. The rest is all vast empty space, which is referred to as Shiva. That is the womb from which everything is born, and that is the oblivion into which everything is sucked back. Everything comes from Shiva and goes back to Shiva.The word “Shiva” means literally, “that which is not.” On another level, when we say “Shiva,” we are referring to a certain yogi, the Adiyogi or the first yogi, and also the Adi Guru, the first Guru.
So Shiva is described as a non-being, not as a being. Shiva is not described as light, but as darkness. Humanity has gone about eulogising light only because of the nature of the visual apparatus that they carry. Otherwise, the only thing that is always, is darkness. Light is a limited happening in the sense that any source of light – whether a light bulb or the sun – will eventually lose its ability to give out light. Light is not eternal. It is always a limited possibility because it happens and it ends. Darkness is a much bigger possibility than light. Nothing needs to burn, it is always – it is eternal. Darkness is everywhere. It is the only thing that is all pervading.
But if I say “divine darkness,” people think I am a devil worshiper or something. In fact, in some places in the West it is being propagated that Shiva is a demon! But if you look at it as a concept, there isn’t a more intelligent concept on the planet about the whole process of creation and how it has happened. I have been talking about this in scientific terms without using the word “Shiva” to scientists around the world, and they are amazed, “Is this so? This was known? When?” We have known this for thousands of years. Almost every peasant in India knows about it unconsciously. He talks about it without even knowing the science behind it.
The First Yogi
On another level, when we say “Shiva,” we are referring to a certain yogi, the Adiyogi or the first yogi, and also the Adi Guru, the first Guru, who is the basis of what we know as the yogic science today. Yoga does not mean standing on your head or holding your breath. Yoga is the science and technology to know the essential nature of how this life is created and how it can be taken to its ultimate possibility.
This first transmission of yogic sciences happened on the banks of Kanti Sarovar, a glacial lake a few miles beyond Kedarnath in the Himalayas, where Adiyogi began a systematic exposition of this inner technology to his first seven disciples, celebrated today as the Sapta Rishis. This predates all religion. Before people devised divisive ways of fracturing humanity to a point where it seems almost impossible to fix, the most powerful tools necessary to raise human consciousness were realized and propagated.
One and the Same
So “Shiva” refers to both “that which is not,” and Adiyogi, because in many ways, they are synonymous. This being, who is a yogi, and that non-being, which is the basis of the existence, are the same, because to call someone a yogi means he has experienced the existence as himself. If you have to contain the existence within you even for a moment as an experience, you have to be that nothingness. Only nothingness can hold everything. Something can never hold everything. A vessel cannot hold an ocean. This planet can hold an ocean, but it cannot hold the solar system. The solar system can hold these few planets and the sun, but it cannot hold the rest of the galaxy. If you go progressively like this, ultimately you will see it is only nothingness that can hold everything. The word “yoga” means “union.” A yogi is one who has experienced the union. That means, at least for one moment, he has been absolute nothingness.
When we talk about Shiva as “that which is not,” and Shiva as a yogi, in a way they are synonymous, yet they are two different aspects. Because India is a dialectical culture, we shift from this to that and that to this effortlessly. One moment we talk about Shiva as the ultimate, the next moment we talk about Shiva as the man who gave us this whole process of yoga.
In the yogic culture, Shiva is not seen as a God. He was a being who walked this land and lived in the Himalayan region. As the very source of the yogic traditions, his contribution in the making of human consciousness is too phenomenal to be ignored. Every possible way in which you could approach and transform the human mechanism into an ultimate possibility was explored thousands years ago. The sophistication of it is unbelievable. The question of whether people were so sophisticated at that time is irrelevant because this did not come from a certain civilisation or thought process. This came from an inner realisation. This had nothing to do with what was happening around him. It was just an outpouring of himself. In great detail, he gave a meaning and a possibility of what you could do with every point in the human mechanism. You cannot change a single thing even today because he said everything that could be said in such beautiful and intelligent ways. You can only spend your lifetime trying to decipher it.
Shiva & Shakti shrines from 8-12 century AD
In this country, in ancient times, temples were built mostly for Shiva, no one else. It was only in the last 1000 or so years that other temples came up. The word “Shiva” literally means “that which is not.” So the temple was built for “that which is not.” “That which is” is physical manifestation; “that which is not” is that which is beyond the physical. A temple is a hole through which you enter into a space which is not. There are thousands of Shiva temples in the country, and most of them don’t have any form as such. They just have a representative form and generally it is a linga.
source - http://isha.sadhguru.org/