So what I was thinking was just that kyudo is like an exquisitely sensitive instrument for detecting internal stress. As I mentioned once before, it seems to me that what makes emotions seem so much more “real” than just thoughts is that, due to habituation/karma, certain types of thoughts condition tension in the muscles of the body (often most notably the face, but also chest, shoulders, hands, etc), as well as other physical changes. All of these tensions can directly affect the ability of the archer to set up a clean release in which the arrow flies naturally to the target, so practice can, at least, come down to recognizing that, in order to get that clean release, you need to eliminate these kinds of tension, and in order to do that, you must either eliminate or develop the ability to remain detached from thoughts. And so the emphasis on mushin.
I wonder about this kind of thing because both I and my Buddhist compatriots sometimes question the time I put into kyudo when, of course, I could be doing other practices. So is it a path to my goal or not? At present I don’t have a firm answer.