... fixation and binding are to be avoided, in both the sword and the hand. Fixation is the way to death, fluidity is the way to life. - Miyamoto Musashi

Fixation is the way to death, fluidity is the way to life. This is something that should be well understood.

Second is the Water book. With water as the basis, the spirit becomes like water. Water adopts the shape of its receptacle, it is sometimes a trickle and sometimes a wild sea. … If you master the principles of sword-fencing, when you freely beat one man, you beat any man in the world. The spirit of defeating a man is the same for ten million men. … The principle of strategy is having one thing, to know ten thousand things.

To win any battle, you must fight as if you are already dead.

Antiguamente éstos se llamaban tachi y katana, o el gran sable y el sable; actualmente se llaman katana y wakizashi;