Sickness of the Mind

To think only of winning is sickness. To think only of using the martial arts is sickness. To think only of demonstrating the result of one's training is sickness, as is thinking only of making an attack or waiting for one. To think in a fixated way only of expelling such sickness is also sickness. Whatever remains absolutely in the mind should be considered sickness. As these various sickness are all present in the mind, you must put your mind in order and expel them.

---Yagyu Munenori