Just as tops spinning violently and rapidly becomes steady, the most rapid movements results in calm. Like the eye of the typhoon, which, is always peaceful, inner calm results in great strength of action. Calm and action are exactly one. Only when we keep our one point and unify our mind and body, can we find spare time even when we are busy. Keep a calm mind and you will be able to perform to the best of your ability, even in an emergency or when facing important tasks.
13 : The unity of calm and action - Ki Sayings (2003)