Acharya Prashant explains that the battle of life should be fought for truth and righteousness rather than personal gain, defining this as selfless action. He emphasizes the importance of slowing down the mind's frantic pace to achieve the state of being a witness. Just as a batsman cannot hit a ball moving too fast or one cannot count the blades of a rapidly spinning fan, a mind in constant, high-speed motion cannot perceive reality. He notes that excessive speed is often a sign of fear, while complete inactivity represents inertia. The goal is to achieve a balanced or right speed, which allows for clarity and the realization that life is not as frightening as it seems when one is rushing.