Awareness means you are sensitive to you environment. Sensitivity is defined as is the state of being "very keenly susceptible to stimuli." A skilled Taekwondo artist is always sensitive to and capable of responding instantly to a variety of attacks. Fighting skills, such as power and speed, may erode with age, but knowledge and sensitivity may grow throughout one's lifetime.
As Taekwondo students, our goal is the unification of mind and body, where the mind and body both act as one to react to any situation without conscious thought. This may only be accomplished through repetitious, physical motions. While driving, we apply the brake without consciously thinking about how to apply it, we just do it. This braking reaction comes braking so many times that the motion has become an unconscious action.
To become this sensitive, the body must be subordinate to the mind, responding immediately to events that the mind can recognize and identify. When we are sparring, we must unconsciously be aware of an attacker's positions and motions and respond accordingly. This requires a highly developed state of sensitivity. The more developed the degree of sensitivity, the more subtle the motions or actions of the attacker may be detected.