I have read about it and come across it in multiple types of media. From books by masters of different martial arts, including Musashi I believe, to common meditation commercials. However, I cannot find any literature on how Ki can benefit the individual, whether it be in their normal day to day lives or in the midst of fighting or sparring. So here are three questions: What is Ki? How does Ki benefit me as a student of the martial arts who wishes to break his limits and become stronger? How do I "increase" my Ki?