“Yagyu Munenori himself stresses the overcoming of ego through self-discipline in the art of swordsmanship. In a treatise known as The Household Transmission on the Art of Fighting he writes that the goal of training in the martial arts is to overcome six kinds of disease: the desire for victory, the desire to rely on technical cunning, the desire to show off, the desire to psychologically overwhelm the opponent, the desire to remain passive in order to wait for an opening and the desire to become free of these diseases.”
― Kisshomaru Ueshiba, from his book “The Spirit of Aikido”