15. Intone a sound, as aum, slowly. As sound enters soundfulness, so do you.

16. In the beginning and gradual refinement of the sound of any letter, awake.

17. While listening to stringed instruments, hear their composite central sound; thus omnipresence.

I wonder whether or not you have heard about the concept of anti-matter. A new concept has entered recently in the world of physics – the concept of anti-matter. It has been felt always that nothing can exist in the universe without its opposite. It is impossible to conceive of anything which exists alone without its opposite. The diametrically opposite must be there whether known or not.

The shadow cannot exist without light, life cannot exist without death, morning cannot exist without night, man cannot exist without woman – or the same with anything you can think of.

The diametrically opposite pole is inevitably needed. This was always proposed in philosophy, but now this is a proposition of physics. And very absurd notions have developed because of this concept. Time moves from the past to the future, but now physicists say that if time moves from the past to the future, there must be somewhere the opposite time process, which moves from the future to the past; otherwise this time process cannot be – but it is. The opposite, the diametrically opposite must be there somewhere – anti-time. Moving from the future to the past? It looks very absurd. How can something move from the future to the past?

They also say that matter exists, so anti-matter must be existing somewhere. What will be the anti-matter? Matter is density. Suppose a stone is here in my hand. What is that stone? Around it is space and in the space there is a density of matter. That density is matter. What will be the anti-matter? They say anti-matter will be just a hole in space. Density is matter, and there is also a hole in space with nothing in it. A space will be around it, but it will be just a hole of nothingness. They say anti-matter must exist to balance matter. Why am I talking on this? Because these sutras which are to follow are based on this “anti” phenomenon.