Also, over time we have realized that it is not possible to significantly change our life, for better or for worse, by manipulating the material world. Not by working harder, not by studying longer, not by schmoozing, not by sweating, not by fasting, not by the hair of our chinny chin chin.
Through time and many mistakes, we have found that great change is inescapable when we first begin manipulating the world of our thoughts. Change your thoughts, change your life. Since we control our thoughts, then we control how and when we will change.