-Kasen raised a hand, waving off Ryoji's words. They were platitudes, they both knew it.-

"The purpose of swords...
is to cut in each motion...
What am i to cut?"

The very meaning of a tool's existence is defined by what that tool is used for. A sword is a tool of killing, it can serve no other role. That's is an intrinsic part of Japanese warrior philosophy. I may have focused on the arts in school, but I remember going over that much in my boyhood.

And I... am a sword.