... Allthough the guard may be divided into five kinds, all of them are for the purpose of killing people.
Whether guard you adopt, do not think of it as being on guard; think of it as part of the act of killing.

In battle, if you you make your opponent flinch, you have already won.

    The book of five rings - Miyamoto Musashi

Once a fight has started, if you get involved in thinking about what to do, you will be cut down by your opponent with the very next blow.

When you strike a blow, do not let your mind dally on it, not concearning yourself with whether or not it is a telling blow; you should stike again and again, over and over, even four or five times. The thing is not to let your opponent even raise his head.

A stroke of the sword that does not hit its target is the sword stroke of death; you reach over it to strike the winning blow. Your adversarys inititive having missed its mark, you turn the tables arround and get the jump on your adversary.

    Yagyu Munenori - The book of family Traditions on the art of war.

Attack him where he is unprepared, appear where you are not expected

    The art of war - Sun Tzu