Karma
Karma is basically energy. One person throws out energy through thoughts, words and actions, and it comes back, in time, through other people. Karma is the best teacher, forcing people to face the consequences of their own actions and thus improve and refine their behavior, or suffer if they do not. Even harsh karma, when faced in wisdom, can be the greatest spark for spiritual growth. The conquest of karma lies in intelligent action and unemotional response.