“In the field of budo, it is nothingness that is the most important thing. After all, if you show nothing, pretend nothing, think nothing, are nothing, there is no way for you to be caught by the opponent´s attack.
Moreover, you can move without letting the opponent know what you are going to do. We call that `emptiness’. Emptiness exists, but it does not make its presence known.” (M. Hatsumi)