Karma will take care of itself-Dr. Randy Pausch 
"Its not about how to achieve your dreams. Its about how to lead your life. If you lead your life the RIGHT WAY, the karma will take care of itself. The dreams will come to you" 

Leading you life to where its good could make a big impact in you because leading yourself to whats good karma will know not to mess with you anymore. Choosing the right and leading the right way can change your whole life because like that you wont have to worry about people and if karma's going to get you because of the bad things your doing. Dreams will come to you, you wont even have to try to achieve your dreams because as long as you're leading your life to good everything else comes above