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.

The desire to become free of these diseases.

Yagyū Munenori

Master Swordsman, instructor and advisor to the Tokugawa Shoguns for three generations. From his book, The Household Transmission on The Art of Fighting.