The Void

I've been reading the Book of Five Rings again, and I've been trying to work out what Musashi means by the Void. He says that using it, we can determine our enemies spirit, and use it to influence our own. He doesn't directly describe it, saying that it is nothingness and vice-versa. So, I've been puzzling over it, and I think that I've come across a plausible answer.

The void is nothingness. Nothingness is all around us. Take away the landscape and the air, and there is nothing at all. But the fact is that there can NEVER be nothingness, because there is always something there. Even if you drain the air out of a space, we proclaim that there is a vacuum there, still far from nothingness. But perhaps nothingness doesn't have to be the absence of physical things. It can maybe represent the potential of existence, because there is always the potential for something to exist in a space occupied by nothing. Therefore, we are surrounded by this potential; a potential that enables us to see what could occupy a space, and when it will do so. To use the void is to see past nothingness into potential. If this were to happen, you would be able to see the enemies attack before it happened, because the potential would be there before the physical action of the attack was. So, the true void, I believe, is a realisation that there is a potential to do anything, at any time, and that to become a true follower of the way, a warrior has to interpret and react accordingly and instinctively to the changing of the void.